Record Details

Reproductive biology and diet of the longtail butterfly ray Gymnura poecilura (Shaw, 1804) along western Bay of Bengal

CMFRI Repository

View Archive Info
 
 
Field Value
 
Relation http://eprints.cmfri.org.in/14212/
https://www.cambridge.org/core/journals/journal-of-the-marine-biological-association-of-the-united-kingdom/article/reproductive-biology-and-diet-of-the-longtail-butterfly-ray-gymnura-poecilura-shaw-1804-along-western-bay-of-bengal/1DA61CE94A9C192C254656B86E3CBB0A
https://doi.org/10.1017/ S0025315420000259
 
Title Reproductive biology and diet of the longtail
butterfly ray Gymnura poecilura (Shaw, 1804)
along western Bay of Bengal
 
Creator Muktha, M
Maheswarudu, G
Sreeramulu, K
Kizhakudan, Shoba Joe
 
Subject Fish physiology
Food and Feeding
Ray fisheries
 
Description The reproductive biology and diet of the longtail butterfly ray Gymnura poecilura is described
based on 630 specimens (N = 377 females and 253 males). The mean disc width (WD) of
females and males was 576.7mm (range = 190–920 mm) and 416.3mm (230–550 mm),
respectively. Sexual dimorphism in size was seen, with the maximum size of males being
only 60% of the maximum female size. The disc widths at 50% maturity (WD50) were estimated
to be 506.5mm (females) and 435.9mm (males). The mean uterine fecundity was
3.3 (range = 1–8). The size at birth was between 190 and 220mm WD. Year-round reproduction
was indicated, due to the presence of mature males and gravid females throughout the
year, neonates in multiple months and large variations in embryo size within months.
Feeding intensity increased with body size. Fish accounted for 80.9% of the diet (Index of
Relative Importance, IRI), followed by crustaceans (18.9%) and molluscs. The species was
found to be a specialized feeder.
 
Date 2020
 
Type Article
PeerReviewed
 
Format text
 
Language en
 
Identifier http://eprints.cmfri.org.in/14212/1/JMBAUK_2020_Muktha%20M_Reproductive%20biology%20and%20diet%20of%20the%20longtailbutterfly%20ray%20Gymnura%20poecilura.pdf
Muktha, M and Maheswarudu, G and Sreeramulu, K and Kizhakudan, Shoba Joe (2020) Reproductive biology and diet of the longtail butterfly ray Gymnura poecilura (Shaw, 1804) along western Bay of Bengal. Journal of the Marine Biological Association of the United Kingdom. pp. 1-10.