scholarly journals Understanding the Trophodynamics of Yellowfin Tuna, Thunnus albacares (Bonnaterre, 1788) from the Western Bay of Bengal

2020 ◽  
Vol 20 (12) ◽  
pp. 857-866
Author(s):  
Mamidi Satish Kumar ◽  
Shubhadeep Ghosh
Keyword(s):  
Bay Of Bengal ◽  
Niche Breadth ◽  
Feeding Habits ◽  
Feeding Strategy ◽  
Fork Length ◽  
Thunnus Albacares ◽  
Feeding Preferences ◽  
Feeding Intensity ◽  
Food And Feeding ◽  
Western Bay Of Bengal

The trophodynamics of Thunnus albacares (Bonnaterre, 1788) from the western Bay of Bengal was studied during 2012 – 2015. Feeding intensity revealed that 34.6 % of the fishes had empty-trace stomachs, 52.77% of the fishes had quarter full-half full stomachs and 12.44% of the fishes had three fourth full-gorged stomachs. Feeding intensity increased with an increase in body size of the fishes with high prey to predator weight ratios and with a third of the fishes above 160 cm fork length possessing three fourth full-gorged stomachs. Cephalopods (47%) dominated the prey constituents, followed by semi digested finfishes and shellfishes (28%), finfishes (16%) and crustaceans (9%). Significant shifts in prey items were observed with an increase in fish size. Though squids were predominant in the diet, however, with the increase in size, feeding shift has clearly been observed towards finfishes. Feeding preferences did not vary between sexes. Annual and seasonal similarities were recorded in their food and feeding habits. Prey-specific abundance indicated a relative specialized feeding pattern with high occurence of species belonging to the orders Teuthidae and Perciformes. Levins Standardized Niche Breadth Index of 0.16 indicated limited niche width in the feeding strategy of Thunnus albacares.

Observations on feeding habits of the common dolphinfish, Coryphaena hippurus (Linnaeus 1758) from the western Bay of Bengal

2021 ◽  
Vol 34 ◽  
pp. 24
Author(s):  
Shubhadeep Ghosh ◽  
Satishkumar Mamidi ◽  
Manas Hoshalli Munivenkatappa ◽  
Prathibha Rohit ◽  
Abdussamad Eruppakkottil Median ◽  
...  
Keyword(s):  
Bay Of Bengal ◽  
Prey Species ◽  
Niche Breadth ◽  
Feeding Habits ◽  
Weight Ratio ◽  
Primary Study ◽  
Feeding Intensity ◽  
Coryphaena Hippurus ◽  
Dietary Niche ◽  
Western Bay Of Bengal

Coryphaena hippurus is a large pelagic species and constitutes an important by-catch in drift gillnet, trolling and long-line fishing gears operated along the Bay of Bengal, northeastern Indian Ocean. The present study, first from the region, is aimed at deciphering the feeding dynamics from 1150 individuals collected from 2017 to 2019. 32.17% of the fishes had empty stomachs or was with food traces, 45.57% had partially-full stomachs and 22.26% had full stomachs. The feeding intensity was inferred through stomach filling and predator-prey weight ratio, which was higher in May and lower in January, and increasing as increase in the fish size. Coryphaena hippurus is considered a piscivorous pelagic predator as pelagic teleosts contribute more than half of the prey species. Major prey species were big-eye scad (27.3%), squid (10.3%), crabs (9.3%), Indian mackerel (7.2%), Indian scad (5.9%), whitebaits (5.7%) and sardines (5.4%). Scads and crabs were abundantly preyed during summer and winter, while clupeids and engraulids in monsoon; however, no significant variations were observed in prey composition between sizes. Trophic Level was 4.22 ± 0.15 and Levins Standardized Niche Breadth Index was 0.30. Dietary niche breadth was higher during summer (0.48) and monsoon (0.33) and in fishes measuring 60.0–74.9 cm (0.51) and below 45.0 cm (0.48) indicating generalised feeding. This primary study from Bay of Bengal is the first comprehensive report on trophodynamics for the species and would contribute to its management using trophic interactions.

scholarly journals Seasonal Occurence of Food and Feeding Habit of Labeo bata(Hamilton) (Cypriniformes : Cyprinidae)

2015 ◽  
Vol 12 (1) ◽  
pp. 7-15 ◽  
Author(s):  
Md. Abdur Razzaq Joadder
Keyword(s):  
Food Habits ◽  
Feeding Habits ◽  
Feeding Habit ◽  
Water Bodies ◽  
Feeding Intensity ◽  
Higher Plant ◽  
Plant Parts ◽  
Labeo Bata ◽  
Food And Feeding ◽  
Potential Food

Food and feeding habits of fishes have a great significance in aquaculture practices. It helps to select such species of fishes for culture which will utilize all the available potential food of the water bodies without much competition with one another but will live in association with other fishes. This paper deals with the feeding intensity and food habits of L. bata . Food and feeding habit of freshwater minor carp Labeo bata (120 to 250 mm total length) were studied. The fish is a herbivore, feeding mainly on algae (22.32 %), higher plant parts (31.26 %), protozoans (7.42 %), crustaceans (15.33 %), insects (3.56 %), muds, sand, debris and detritus (16.32 %) and unidentified food materials (3.99%).Journal of Science Foundation, 2014;12(1):7-15

scholarly journals Food and feeding habits of the narrow barred Spanish mackerel, Scomberomorus commerson (Lacepede, 1800) off Karnataka, south-west coast of India

2017 ◽  
Vol 64 ◽  
Author(s):  
K. M. Rajesh ◽  
P. Rohit ◽  
S. Thomas ◽  
V. Suprabha ◽  
G. D. Nataraja ◽  
...  
Keyword(s):  
Feeding Habits ◽  
Fork Length ◽  
Empty Stomach ◽  
Spanish Mackerel ◽  
Scomberomorus Commerson ◽  
South West Coast ◽  
Food And Feeding ◽  
Fish Remains ◽  
Index Of Relative Importance ◽  
Almost All

Scomberomorus commerson were collected on weekly basis during January 2012 to December 2014 at Mangalore Fishing Harbour. Stomach of 214 narrow barred Spanish mackerel measuring from 48 to 105 cm fork length (FL) for males and 45.5 to 115 cm FL for females were analysed to study their feeding habits. Fish with empty stomach were prevalent in almost all the months. Prey mainly comprised of fishes and crustaceans, with the fish component forming 99.9%. The index of relative importance (IRI) showed that the dominant prey were semi-digested fish remains (44.6%) of Sardinella longiceps (30.1%), Decapterus sp. (18.7%), whitebaits (2.5%), Rastrelliger kanagurta (1.5%) and Epinephelus spp. (1.1%), while Saurida sp. (0.7%), Megalaspis cordyla (0.5%), Scombroides sp. (0.2%) and shrimps (0.1%) were found occasionally in the gut. Index of stomach fullness (SFI) was 0.11 in August and 0.65 in January. Generally, SFI was higher during September to January and lower during February to August. The empty stomach ratio (ESR) ranged from 33.3% (August) to 92.3% (April).

scholarly journals Food and feeding habits of the clupeid, Gonialosa manmina (Ham.) from the Kaptai Lake, Bangladesh

2013 ◽  
pp. 53-61
Author(s):  
MA Azadi ◽  
M Nasiruddin ◽  
ASMS Rahman
Keyword(s):  
Feeding Habits ◽  
Gut Contents ◽  
Fish Length ◽  
Feeding Intensity ◽  
Total Length ◽  
Intestine Length ◽  
Food And Feeding ◽  
Total Fish ◽  
Post Spawning ◽  
Gut Length

Food and feeding habits of Gonialosa manmina were done by the analysis of 197 guts of the fish using both occurrence and point methods and also by the Index of preponderance. As per Index of preponderance, the preferred food items were graded as cladocerans (65.34%-1st), copepods (20.96%-2nd), miscellaneous (8.89%-3rd), rotifers (2.81% 4th) and bacillariophyceae (0.77% 5th). High feeding intensity was observed during pre and post spawning months. Significant (P<0.01) positive relationships were observed between the total length (TL) and total gut length (TGL) (TGL=2.09799TL0.89677, r=0.963, t=10.22), total length (TL) and stomach length (StL)(StL=0.18447TL0.7599, r=0.997, t= 39.92), and total length (TL) and intestine length (IL) (IL=0.99105TL1.0256, r=0.9854, t=16.37). Total fish length was slightly shorter than the gut length (1:1.31) and more than 91% animal nature gut contents confirmed that the fish was mainly a surface feeder zooplanktivore in Kaptai lake. DOI: http://dx.doi.org/10.3329/cujbs.v4i1.13386 The Chittagong Univ. J. B. Sci.,Vol. 4(1&2):53-61, 2009

scholarly journals Food and feeding habits of the greenback grey mullet Liza subviridis (Valenciennes, 1836) from Parangipettai waters, south-east coast of India

2016 ◽  
Vol 63 (4) ◽  
Author(s):  
M. Ashiq Ur Rahman ◽  
P. S. Lyla ◽  
S. Ajmal Khan
Keyword(s):  
Feeding Ecology ◽  
Food Item ◽  
East Coast ◽  
Feeding Habits ◽  
Well Being ◽  
Grey Mullet ◽  
Feeding Intensity ◽  
Food And Feeding ◽  
Males And Females ◽  
Sand Particles

The feeding ecology and prey preference of greenback grey mullet Liza subviridis (Valenciennes, 1836) were investigated in Parangipettai waters (11°29′25.55″N; 79°45′38.62″E) from May 2011 to April 2012. A total of 328 male and 360 female specimens of L. subviridis were analysed. Detritus and sand particles formed the major food item of L. subviridis in both sexes besides, diatoms, dinoflagellates, algae, zooplankton, foraminiferans, polychaetes and larval forms were also noticed and ranked respectively based on the quantities. Feeding intensity showed that the percentage of ‘empty’ stomachs varied from 7.2% (November 2011) to 19.3% (August 2011) and from 7.1% (March 2012) to 19.2% (August 2011) in males and females respectively whereas the ‘gorged’ stomach in males and females was in the ranges of 4.6% (March 2012) - 14.5% (December 2011) and 4.6% (September 2011) - 14.5% (April 2012). The gastrosomatic index of males and females ranged between 5.9% (October 2011) - 8.2% (May 2011) and 6.1% (March 2012) - 8.1% (May 2011) respectively. The results agree with the previous reports and extend the understanding on its well-being, reproductive seasons and stock of L. subviridis in Parangipettai waters.

scholarly journals Food and feeding habits of Clarias batrachus (Linnaeus, 1758) from Ambajogai, Maharashtra, India

2014 ◽  
Vol 2 (2) ◽  
pp. 148
Author(s):  
Vishwas Balasaheb Sakhare ◽  
Ashvini Dnayndeo Chalak
Keyword(s):  
Food Item ◽  
Feeding Habits ◽  
Clarias Batrachus ◽  
Small Fish ◽  
Insect Larvae ◽  
Feeding Intensity ◽  
Food Items ◽  
Organic Debris ◽  
Feeding Activities ◽  
Food And Feeding

The food analysis of 150 specimens of Clarias batrachus revealed that the food consisted of insect larvae, small fish, shrimps and organic debris. Small fish and insect larvae were preferred as the primary food item in all the seasons. On average for all months of the study period, small fish dominated the list with a percentage of 30.27.The other food items in descending order are insect larvae (27.66%), worms (20.27%), shrimps (14.3%) and organic debris (7.05%).The feeding intensity in mature fishes was found to be very poor during August to September. This period of poor feeding activities in case mature fishes coincides with the peak spawning season.

scholarly journals Biometry, length-weight and length-length relationships of flathead sillago Sillaginopsis panijus (Hamilton, 1822) (Perciformes: Sillaginidae) from the north-western Bay of Bengal

2020 ◽  
Vol 67 (3) ◽  
Author(s):  
Suraj Kumar Pradhan ◽  
Subal Kumar Roul ◽  
Shubhadeep Ghosh ◽  
Pritam Tripathy ◽  
A. K. Jaiswar ◽  
...  
Keyword(s):  
Bay Of Bengal ◽  
Fork Length ◽  
Mesh Size ◽  
Population Based ◽  
Total Length ◽  
The North ◽  
Baseline Information ◽  
Eye Diameter ◽  
Western Bay Of Bengal ◽  
North Western

Biometry, length-weight relationships (LWRs) and length-length relationships (LLRs) of Sillaginopsis panijus (Hamilton, 1822) were investigated in the Indian coast of north-western Bay of Bengal. Altogether 622 specimens were collected between August 2018 and September 2019 from landings by trawls (30-35 mm mesh size), gillnets (15-55 mm mesh size) and shore seines (7-15 mm bag mesh size). The total length and weight of the specimens ranged from 7.8-40.3 cm and 2.9-506 g, respectively. The LWR established was W=0.0048 L3.059 for males, W=0.0032 L3.185 for females and W=0.0047 L3.0645 for indeterminates, indicating positive allometric growth pattern. All the LWRs were highly significant (p<0.001, r2≥0.977). The highest coefficient of correlation (r) was observed for total length against fork length (0.999) and lowest for head length against eye diameter (0.951). The fin formula was expressed as D1 X, D2 I + 24-28, P 17-22, V I + 5, A II + 25-27, GR 2-3/6-9. The study provides the first detailed account of the biometric relationships of S. panijus in the north-western Bay of Bengal, which can be used as baseline information for subsequent biological and population based studies in the region.

scholarly journals Food and feeding habits of the Gangetic hairfin anchovy Setipinna phasa (Hamilton, 1822)

2019 ◽  
Vol 66 (4) ◽  
Author(s):  
M. Serajuddin ◽  
Brijesh K. Chaubey
Keyword(s):  
Feeding Habits ◽  
Relative Length ◽  
Base Line ◽  
Life Stages ◽  
Sustainable Aquaculture ◽  
Feeding Intensity ◽  
Food And Feeding ◽  
Major Shift ◽  
River Ganga ◽  
Basic Characteristics

Dietary composition and feeding intensity in relation to season, size and maturity stages of the Gangetic hairfin anchovy Setipinna phasa (Hamilton, 1822) were investigated in the present study. Strong dentition, modified gill rakers, strongly built stomach and short intestine were some of the basic characteristics associated with the feeding habits of S. phasa. Relative length of gut (RLG) indices indicated the absence of any major shift from basically carnivorous orientation of the fish during its various life stages. Feeding intensity was relatively high in stage III (gonad ripening stage) and low in the stages IV and V (ripe and spent). Insects and crustaceans were the main food of adults while annelids and insects were eaten by juveniles. Adult individuals of river Ganga consumed more food during winter than summer and rainy seasons, while the food intake in adult specimens of Hooghly Estuary was greater during summer compared to winter and rainy seasons. Study of food and feeding habits of fishes provides base line information for facilitating fisheries management programmes and sustainable aquaculture.

scholarly journals Morphology, Food and Feeding Habit of Goby Fish, Parachaeturichthys ocellatus from the Creeks of Mumbai

2020 ◽  
Vol 3 (11) ◽  
pp. 95-100
Author(s):  
Bindu Panicker
Keyword(s):  
Feeding Habits ◽  
Predatory Fish ◽  
Gut Contents ◽  
Fishing Community ◽  
Feeding Intensity ◽  
Fish Samples ◽  
Food And Feeding ◽  
Gut Length ◽  
General Diet ◽  
Food Consumed

Goby fish Parachaeturichthys ocellatus, native to the creeks of Mumbai coast forms a major part of creek fishery for the fishing community inhabiting areas near the creeks. The food and feeding habits of the fish were studied by collecting fish samples every month in from June 2010 to September 2011 from the creeks of Mumbai. The length of the fishes studied ranged between 66mm to 185mm.The body morphology of fish revealed it to be carnivorous benthic and predatory fish. The gut contents of the fish showed the presence of crustaceans as basic food, mollusc and pisces formed the secondary food while detritus formed obligatory food and planktons and other miscellaneous food (larvae of insects, worms, rotiferons, dinoflegellates foraminiferons etc.) were incidental food. An analysis of seasonal variation in food preference and feeding intensity reveal that the male and female P.ocellatus had the same preference throughout the seasons but was different for the juveniles. In P.ocellatus cannibalism was observed, but its occurrence was not regular in the general diet. The relative gut length was 0.68 in male, 0.70 in female and 0.79 in juvenile. The empty guts of P.ocellatus seem to indicate predatory mode of feeding. P.ocellatus occupy the position of secondary and tertiary consumers in the food chain determined by the size and type of the food consumed by the fish.

scholarly journals Food and Feeding Habits of the Deep-Water Mud Shrimp (Solenocera melantho) of Visakhapatnam Coast, India

2017 ◽  
Vol 9 (2) ◽  
pp. 161-168
Author(s):  
Rama Chandra Ganesh PATURI ◽  
Sarvabhowma Chakravarty MYLA
Keyword(s):  
Feeding Habits ◽  
Gut Contents ◽  
Scavenging Activity ◽  
Feeding Intensity ◽  
Diet Preference ◽  
Food And Feeding ◽  
Fish Remains ◽  
Males And Females ◽  
Visakhapatnam Coast ◽  
Food Consumed

The food and feeding habits of the shrimp Solenocera melantho off Visakhapatnam coast were studied qualitatively and quantitatively. Feeding intensity differs in relation to gender, size, season and stage of maturity. Detritus was the major component of the food consumed, followed by crustaceans, molluscs, foraminiferans, fish remains, eggs; sand was also found as one of the gut contents. Diet preference in males and females was similar, but varied with size and season. The index of preponderance of detritus was 50.88% in males and 47.16% in females. Variation in feeding intensity was noticed in relation to size, months and season. The overall feeding intensity in males and females was categorized as actively fed (21.52% and 40.78% respectively), moderately fed (22.07%, 19.72%) and poorly fed (14.07%, 27.03%) respectively. S. melantho may designate as an omnivorous detritivore with scavenging activity. 

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