Osteogeneiosus Research Articles

Comparative Osteology Study of Ariid Catfishes along the Coast of Gulf of Mannar and Wadge Bank, Tamil Nadu

Background: Taxonomic ambiguity still exists in ariid catfish species identification. Morphological similarities occur in ariid catfishes which lead to misidentification of the species. To overcome this taxonomic ambiguity osteology is one of the effective integrated taxonomic tools for species discrimination. From this study, we provide an osteotaxonomic key for the field identification of ariid catfish species. Methods: The fish samples were cleaned and washed with the freshwater put into the sample for 1% potassium hydroxide solution (KOH). Then fish samples were allowed for alkali digestion of muscle in the solution for 24-48 hours depending on the condition of the specimen. After the completion of the muscle digestion process, Alizarin S dye was used for staining the fish bones. Result: The present paper deals with a comparative study of the five Ariidae family species discussed, they are Arius arius (Hamilton,1822), Plicofollis layardi (Gunther,1866), Netuma thalassina (Ruppell, 1837), Nemapteryx caelata (Valenciennes, 1840) and Osteogeneiosus militaris (Linnaeus, 1758). The osteological portions used for this study like premaxillary, dentary, neurocranium, otolith, vertebral and caudal bone. The aforementioned osteological portions made the important primitive characters that will be used to differentiate the species.

Microplastic Accumulation in Catfish and Its Effects on Fish Eggs from Songkhla Lagoon, Thailand

Microplastics have been found to accumulate in freshwater, marine ecosystems, and biological organisms. The frequency of studies on microplastic contamination in organs has increased recently, although there have been relatively fewer investigations on fish eggs in Thailand. To extract microplastics from catfish samples for laboratory analysis (Osteogeneiosus militaris), we used 10% potassium hydroxide in the digestion process. A needle penetrated the fish eggs to investigate microplastic contamination. We examined microplastics under a stereomicroscope and used Fourier transform infrared spectroscopy to determine the type of polymer. We found microplastic contamination in organs, most commonly in the stomach (0.91 ± 0.13 items/g), followed by tissue (0.53 ± 0.09 items/g), and gills (0.30 ± 0.03 items/g) at the level of significance p < 0.01. We found a total of 349 fish eggs with 27 items of microplastic. The dominant microplastic we found in the stomach, tissue, and gills of the fish, as well as in fish eggs, was of fiber shape. We noted that fragments were found only in the stomach and tissue of fish. The dominant color of microplastics was black in organs and blue in fish eggs. The common polymer types in organs and fish eggs were polyethylene terephthalate, polypropylene, and cellulosic fiber.

Taxonomic and Otolith Shape Parameters of Nine Sympatric Catfishes Commercially Harvested in Pakistan

Abstract Accurate reorganization of harvested species is essential for appropriate fisheries monitoring but often unnoticed. In this study, an attempt was made to provide an accurate species description based on fish taxonomy and otolith shape parameters of nine sea catfishes living in Pakistan. The lapillus, the largest otolith of catfishes, includes the position of the umbo, the structure of the anterior mesial projection (amp), the incisura linea basalis (ilb) and sulcus lapilli marks (slm) in nine ariid catfishes were evaluated. Discriminant function analysis was performed using twenty-two morphometric parameters showed significant variations between the length of the maxillary barbel, adipose length and preorbital length, which were highlighted as basic discriminating characters. Species without barbells, such as Batrachocephalus mino and Osteogeneiosus militaris, were found to be distant. The taxonomic characters of the genera Netuma and Plicofollis overlapped due to a short adipose fin length. Nevertheless, species Arius arius, Sciades sona and Nemapterxy caelatus differed in a moderate adipose fin length. The preorbital length of Netuma bilineata has a short and rounded snout, while N. thalassina has a long and pointed snout, which is a distinguishing characteristic of both species. The coincident use of fish taxonomy and otolith shape parameters is an effective tool for catfish identification could be helpful in appropriate fisheries sampling programs and management in Pakistan whenever implemented.

Studi kasus prospek usaha kerupuk ikan di Kampung Semanting Kabupaten Berau

Semanting village is well known for its natural resources. Fishing and its related produce has been identified as the main home industry in this village. One of the most popular fish produce is fish cracker managed by Hj. Asfiah. The main ingredient of this product is milk fish (chanos-chanos) and otek fish (Osteogeneiosus militaris). In order to identify the internal and external strategy of this business, the SWOT analysis was applied to evaluate strength, weakness, opportunity and threat that might affect the business sustainability. The analysis indicated that the strength and opportunity (S-O) is essential and need to be managed. Based on the estimation values, this business is feasible and scale improvement is necessary.

Research Article: Population biology and exploitation status of four commercially important marine fishes of the northern Bay of Bengal, India

In the present paper population structure of four commercially important fishes were studied, namely Tenualosa ilisha, Pampus argenteus, Scomberomorus guttatus and Osteogeneiosus militaris, in the Sundarban Estuary of the northern Bay of Bengal from June 2011 to March 2012. However, a thorough understanding of life history based on length and weight data of these four fishes (617 T. ilisha, 485 P. argenteus, 351 S. guttatus and 416 O. militaris) would be immensely important. Results of such studies would be important for sustainable management of these highly economic biological resources. The analysis of life history parameters of these four species, such as growth, exploitation, mortality, etc. showed that their stocks in coastal waters off West Bengal were overexploited during the study period as exploitation rate of T. ilisha, P. argenteus, S. guttatus and O. militaris were 0.78, 0.62, 0.75 and 0.54 respectively. Widespread fishing of juvenile and growing fish declined the population considerably losing the economic advantage. Good governance, strong law enforcement and effective management system should be sure for actual benefit from the fish resources and improving livelihoods of dependent communities.

Quality assessment of fishes caught by single-day and multi-day gillnet fishing off Satpati Coast, Maharashtra, India

The present investigation was aimed at elucidating the importance of freshness and quality for the consumer and its relationship to sensory and non-sensory properties of fish caught by single-day and multi-day gillnet fishing off Satpati Coast, Palghar District, Maharashtra, India. Selected species of marine fishes viz., Pampus argenteus, Ilisha filigera, Osteogeneiosus militaris, Thryssa mystax and Sardinella gibbosa from single-day and multi-day gillnet fishing trips were collected and assessed based on freshness score, microbiological and biochemical parameters. The average values of sensory score, total plate count (TPC) and pH for fish samples from single-day fishing were 25 to 26; 1.9×104 cfu g-1 to 7.3×104 cfu g-1 and 6.8 respectively, whereas for multi-day fishing, it was 12 to 17; 7.1×104 cfu g-1 to 1.8×105 cfu g-1 and 7.07 respectively. Significant difference (p<0.05) was observed for the values of pH, trimethyl amine (TMA), total volatile base-nitrogen (TVB-N) and thiobarbituric acid reactive substances (TBARS) between the fish samples from single-day and multi-day fishing for two species viz. T. mystax and I. filigera. The study indicated that fishes caught from both single-day and multi-day units were acceptable for human consumption. Results of the study provides insight into the quality aspects of fish landed by commercial fishing crafts by comparing single-day and multi-day fishing.

THE DISTRIBUTION OF ARIID CATFISH (ARIIDAE) IN THE HAU RIVER ESTUARY

From July 2017 to June 2019 at Hau estuary in the Mekong Delta, Vietnam, Ariid catfish were surveyed from theHau River estuary (Tran De and Dinh An) to Cai Cui area. Fishing yield was calculated based on CPUE (catch per unit effort). Five species of Ariid catfish were recorded (Arius maculatus, Osteogeneiosus militaris, Ariusvenosus, Nemapteryx nenga and Cephalocassis borneensis). The relative abundance of Ariid catfish was substantial and reached the highest in Tran De (CPUEw = 934.45 g/ha) followed by Dinh An estuary (CPUE =931.68 g/ha) and Tran De estuary (CPUE = 904.71 g/ha); Fishing yield in Cai Cui was the lowest with a CPUE of 36.48 g/ha. In addition, the highest distribution found was Arius maculatus (63.35%) and was followed by Osteogeneiosus militaris (32.94%). However, the biodiversity of Arridae was not a reflection of relative abundance with the Tran De estuary having the highest result H’ = 0.83, followed by Tran De (H’ = 0.76)and lowest was in Dai Ngai (H’ = 0,10). These results indicate that salinity can be considered a primary factor influencing the distribution of Ariid catfish in Hau River estuary.

Length-weight relationship of eleven species of marine catfishes from the northern Arabian Sea coast of Pakistan

This study records length-weight relationships (LWRs) for eleven commercially important marine catfish species of the family Ariidae (sea catfishes) and Plotosidae (eel catfishes) from the northern Arabian Sea coast of Pakistan. The specimens were sampled from December 2014 to November 2015, using bottom trawls with various mesh sizes by commercial vessels. The species were Nemapteryx caelatus, Sciades sona, Arius gagora, Batrachocephalus mino, Netuma thalassina, N. bilineata, Osteogeneiosus militaris, Plicofollis dussumieri, P. tenuispinis, Plotosus limbatus, and P. lineatus. Of the eleven species, two species A. gagora and N. bilineata were recorded for the first time and LWRs for four species A. gagora, N. bilineata, S. sona, and B. mino still have no data in the FishBase database. In addition, new maximum length for each of the three species N. bilineata, O. militaris and B. mino was also found.

Length-weight relationships of six tropical fish species from Chilika Lagoon, India

Summary The length weight relationships (LWRs) of six tropical fish species from Chilika Lagoon, India were studied. Specimens were caught using a wide range of fishing gear operated in the lagoon from January to December 2014. The fresh specimens were measured for total length and weight, then dissected and the sex confirmed. Previously unavailable in FishBase, the detailed LWRs of Daysciaena albida, Eleutheronema tetradactylum, Etroplus suratensis and Mystus gulio are reported for the first time. Maximum total lengths reported for Nematalosa nasus and Osteogeneiosus militaris in this study are new records for these species. The existence of a differential growth between male and female O. militaris was confirmed, which was not known earlier.

An Assessment on Economic Impact of Growth Over Fishing of Commercially Important Marine Ariids Along Mumbai, Northwest Coast of India.

The economic assessment on juvenile landings of four dominant marine catfishes at New Ferry Wharf (NFW) landing centre, Mumbai, Northwest coast of India was carried out during January to December, 2013. The dominant catfishes viz. Nemapteryx caelata (19.7 %), Plicofollis dussumieri (21.5 %), P. tenuispinis (24.8 %) and Osteogeneiosus militaris (27.5 %) together contributing 93% of total marine catfish landings of the state. Among four species, the juvenile landings of N. caelata contribute maximum(93.17 %) followed by P. dussumieri (57.14 %), O. militaris (36.11 %) and P. tenuispinis (21.43 %) with the maximum landing during November to March . The bioeconomic model reveals that if juveniles are allowed to grow up to length at first maturity (Lm); an estimated total annual economic gain will be Rs. 13.15 crores with an estimated biomass gain of 1222 t per annum. The estimated total annual biomass is increased by 2.07 times with an increase in additional revenue by 3.7 times would have been realised. The results of present study suggest that sustainable harvest of these resources would have been yielded maximum economic return to the fishers. With the help of stakeholders participatory approach, management measures such as strict mesh size regulation, effort restriction on bottom trawl up to 50 m depth and awareness campign on catching juveniles and adult in particulat to the oral incubated male ariids, would have been implemented during November to March to avoid growth over fishing.

Morphometry, length-weight relationship and relative condition factor of marine catfish,Osteogeneiosusmilitaris (Linn., 1758) of Mumbai waters

The meristic and morphometric characters as well as the length-weight relationship and condition factor of the marine cat fish, Osteogeneiosus militaris (Linn.,1758) off Mumbai waters was investigated. Based on the meristic characters, the fin formula can be written as; D I,7 , P I,10-11 , V 6 , A 18-22 , C 17-19 . The morphometric characters of indicated high degree of correlation among the compared characters. The length-weight relationship of the species is given as, W = 0.000006 L 3.05 for females, W = 0.000008 L 3.01 for males and W = 0.000007 L 3.03 for pooled sexes which implies that the species found off Mumbai waters has isometric growth. The co-efficient of co-rrelation between length and weight was found to be very high (r = 0.981, 0.962 and 0.977) for females, males and sexes pooled, respectively. The condition factor was found to be higher for females than those of the males. This indicates that females are in better condition compared to males. The seasonal variation observed in the condition factor for both the sexes could be related to reproductive cycle and feeding.

Food and feeding habits of marine catfish, Osteogeneiosus militaris (Linn., 1758) off Mumbai waters

The food and feeding habits of the marine cat fish, Osteogeneiosus militaris (Linn.,1758) off Mumbai waters was studied. The species was found to be carnivorous and predacious in feeding habit. Index of preponderance values indicated that, it feeds mainly on crustaceans (shrimps, crabs), molluscs (bivalves, squids) and small fishes ( Coilia spp ., ribbon fish). Among the food groups, crustaceans dominate throughout the year in comparison to molluscs and fishes. In the crustacean group, Acetes spp. was found to be the dominant food item contributing to 43.34 per cent followed by penaeid shrimps, which shared 27.65 per cent of the total food in all the months. Analysis of month-wise percentage food composition revealed that, the species fed the highest percentage of Acetes spp . during the month of November (34.92%) while penaeid shrimps was consumed in the largest percentage in January (35.10%). With respect to the size (length) of the fish, the percentage of Acetes spp. as a food item was highest (52.99%) for the length group of 391-420 mm and lowest (25.64%) for 361-390 mm. The guts were found to be empty for fishes having length of more than 420 mm. Results of the feeding intensity delineated that, the species is not a voracious feeder as none of the individuals studied was found to have gorged or full stomach over the entire period of investigation. Among the different length groups, the highest feeding fishes were in the length group of 211-240 mm. Gastro-somatic index was highest during August for males and during November for females while the pooled value was highest in January (3.206).

Distribution of Trace Elements in Sediments and Biota of Songkhla Lake, Southern Thailand

The concentrations of Co, Ni, Cu, Zn, Cd, Pb, As, Fe, Mn, and Al were determined in sediments and biota of Songkhla Lake, a shallow coastal lagoon located in southern Thailand. In June 2006, surface sediments were sampled in 44 stations in the three sections of the lake (inner-, middle-, and outer sections). Sediment cores were also sampled in 13 stations in three cross-sections of the lake. In surface sediments, trace and major elements, organic matter, sediment grain size analysis, and sulfides were determined, and in the sediment cores, redox profiles were made. Soil samples were also collected at garbage dumping sites in the vicinity of the lake. In addition, the metal accumulation in two catfish species (Arius maculatus and Osteogeneiosus militaris) and the crustacean (Apseudes sapensis) was also investigated. Trace element concentrations in sediments of Songkhla Lake show that, especially the Outer section of the lake, in particular the sediments at the mouths of the Phawong, U-Taphao, and Samrong Canals are significantly enriched with trace elements due to municipal, agricultural, and industrial discharges entering the lake through the canals. Aluminum-normalized enrichment factors throughout the lake vary from 0.4 to 1.7 for Ni, 0.3 to 3.3 for Cu, 0.2 to 7 for Zn, 0.1 to 14 for As, 1 to 24 for Cd, 0.7 to 6.8 for Pb, and 0.1 to 7.8 for Mn. Correlations between the elements and sediment characteristics show that Cu, Zn, Cd, and Pb are essentially associated with the sulfide fraction; that Ni and Co are predominantly bound to the clay minerals and iron oxy-hydroxides, and that As is principally bound to iron oxy-hydroxides. The accumulation of trace elements between muscle tissue and liver and eggs of A. maculatus and O. militaris is element-specific, but concentrations of trace elements in fish muscle tissue are well within the limits for human consumption.

Genetic Divergence between Two Marine Catfish of Family Ariidae - Arius maculatus and Osteogeneiosus militaris

Two species of marine catfish, Arius maculatus and Osteogeneiosus militaris, belonging to family Ariidae were analysed electrophoretically for genetic variation in 6 enzymes, alcohol dehydrogenase (ADH), malate dehydrogenase (MDH), lactate dehydrogenase (LDH), glucose dehydrogenase (GDH), malic enzyme (ME) and superoxide dismutase (SOD). Eighteen individuals of each species were studied. Two loci MDH and ADH were polymorphic in both. Average heterozygosity in A. maculatus was 1.46, while it was 2.5 in O. militaris. The allele frequencies were used to estimate Nei's genetic distance (D). The D value was calculated to be 0.6879. Two isozyme loci, ME and SOD, were found to be the most reliable species specific markers. No tissue specific loci were observed for the enzymes studied, the bands being identical in each case. The genetic distance observed between O. militaris and A. maculatus in this study suggests that they would be more appropriately classified as species of the same genus rather than being assigned separate genera. (Asian-Aust. J. Anim. Sci. 2004. Vol 17, No. 9 : 1188-1191)

Chauhanellus Bychowsky & Nagibina, 1969 (Monogenea) from ariid fishes (Siluriformes) of Peninsular Malaysia

Twelve new species of Chauhanellus Bychowsky & Nagibina, 1969 have been found on six species of ariid from Peninsular Malaysia: Chauhanellus trifidus n. sp., C. digitalis n. sp., C. malayanus n. sp., C. forcipis n. sp. and C. intermedius n. sp. from Arius sagor; C. aspinous n. sp. from Arius venosus; C. caelatus n. sp. from Arius caelatus; C. auriculatum n. sp., C. poculus n. sp. and C. pulutanus n. sp. from Arius maculatus; C. duriensis n. sp. from Arius thalassinus; and C. osteogeneiosi n. sp. from Osteogeneiosus militaris. Some of these Chauhanellus species possess characteristics that are not commonly observed in the genus. C. aspinous n. sp., C. intermedius n. sp. and C. digitalis n. sp. exhibit features found in both Chauhanellus and Hamatopeduncularia: these include absence of spines on the mainpart of the dorsal anchors in C. aspinous n. sp. and C. intermedius n. sp. and presence of haptoral digitation in C. digitalis n. sp. Other features are the five transverse rows of peduncular spines in C. duriensis n. sp., ear-like projections on the anchors in C. auriculatum n. sp., and thin sclerotised plates that partly envelope the ventral anchors in C. forcipis n. sp. Mid-dorsal appendices occur on the dorsal bars of seven of the present species.