Genetic isolation among the northwestern, southwestern and central-eastern Indian Ocean populations of the pronghorn spiny lobster Panulirus penicillatus.

Muhamad Abdullah,Alimuddin Alimuddin,Hideyuki Imai,Adnan Salama,Mohamed Muththalib

doi:10.3390/ijms15069242

Abstract

The pronghorn spiny lobster Panulirus penicillatus is a highly valuable species which is widely distributed in Indo-West Pacific and Eastern Pacific regions. Mitochondrial DNA control region sequences (566–571 bp) were determined to investigate the population genetic structure of this species in the Indian Ocean. In total, 236 adult individuals of Panulirus penicillatus were collected from five locations in the Indian Ocean region. Almost all individuals had a unique haplotype. Intrapopulation haplotype (h) and nucleotide (π) diversities were high for each locality, ranging from h = 0.9986–1.0000 and π = 0.031593–0.043441. We observed distinct genetic isolation of population located at the northwestern and southwestern edge of the species range. Gene flow was found within localities in the central and eastern region of the Indian Ocean, probably resulting from an extended planktonic larval stage and prevailing ocean currents.

Highlights

The pronghorn spiny lobster Panulirus penicillatus is widely distributed in the Indo-West Pacific and Eastern Pacific regions
The nucleotide sequences of the haplotypes were deposited in the DNA Data Bank of Japan (DDBJ)
Congruent with the pattern observed in the network haplotypes (Figure 1), we found strong regional structuring between Red Sea and other Indian Ocean populations of P. penicillatus, which explained high genetic variations (51%) between the regions

Summary

Introduction

The pronghorn spiny lobster Panulirus penicillatus is widely distributed in the Indo-West Pacific and Eastern Pacific regions. It is found in tropical and adjacent regions from South-Eastern Africa, the Red Sea, Southern India, the Southeast Asian Archipelago, Japan, Northern Australia, and the Southern and Western Pacific Islands, to Hawaii, the Galápagos Islands, and other islands of the Eastern. P. penicillatus supports considerable fisheries in Indo-Pacific regions. Recognition of stocks is complicated by the life cycle of pronghorn spiny lobster, primarily because of the potential for long-range dispersal during its planktonic larvae. The early life history of spiny lobsters consists of a drifting larval period adapted for a relatively long-term stay in the open ocean, extending from several months to more than a year, with many possibilities for dispersal through ocean currents [4,5]

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