Fecundity of the invasive Hepu mitten crab, Eriocheir hepuensis Dai, 1991 (Grapsoidea: Brachyura) from Shatt Al- Arab and Arabian Gulf. Iraq

Intisar M.A. Jabbar; Salah M. Najem; Entesar N. Sultan

doi:10.5281/zenodo.7936795

Intisar M.A. Jabbar Dept. of Marine Biology, Marine Science Centre, Univ. of Basrah, Basrah, Iraq
Salah M. Najem Dept. of Fish and Fisheries Resources, Collage of Agriculture, University of Basrah, Basrah, Iraq
Entesar N. Sultan Dept. of Fish and Fisheries Resources, Collage of Agriculture, University of Basrah, Basrah, Iraq

DOI: https://doi.org/10.5281/zenodo.7936795

Keywords: Hairy crabs, Eriocheirhepuensis, Invasive crabs, Hepu mitten crab, Fecundity

Abstract

The present study was carried out to investigate the fecundity of species of Branchyuran crustaceans Eriocheir hepuensis Specimens were collected from different regions of Shatt-Al-Arab river, North-West Arabian Gulf and Khour Abdulla during the period from Autumn 2016 to Summer 2017 by fishing trawl net. The total wet weight of specimens ranged between (92.27-199.27) gm. The crab’s carapace lengths were between (4.2 - 9.4) cm. Absolute fecundity was found to be from (252331.4 – 1636153.4) eggs/female. The relative fecundity ranged between (2181 – 13440.1) eggs/gm. The correlation values at the probability level of 0.05 between absolute fertility rate with carapace width and total weight were r=0.93,r=0.96 respectively.

Eggs development stages in E.hepuensis crabs are divided into seven stages. The objective of this study was to measurements the fecundity for assessing population reproductive dynamics and energetics and for estimating the annual reproductive output and how it is linked to recruitment and population growth.

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