Biology and fishery of barred spiny eel, Macrognathus pancalus Hamilton

Suresh, Vettath Raghavan; Biswas, B. K.; Vinci, G K; Mitra, Krishna; Mukherjee, A. S.

doi:10.3750/aip2006.36.1.05

Cited by 26 publications

(32 citation statements)

References 13 publications

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“…Rather similar values of L ∞ estimated by elefan‐i and Wetherall Plot methods were also obtained by Azadi et al. (1997) in Gudusia chapra and Gonialosa manminna , and Suresh et al. (2006) in Macrognathus pancalus .…”

Section: Discussionsupporting

confidence: 86%

Population structure and reproductive biology of a freshwater fish, Labeo boggut (Sykes, 1839), from two perennial rivers of Yamuna basin

Sarkar

Kumar

Dubey

et al. 2011

Journal of Applied Ichthyology

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Population structure and reproductive biology of an important and less studied freshwater carp, Labeo boggut (Sykes, 1839), from two perennial rivers of Central India were studied between January 2008 and December 2009. Maximum three annual rings were found and used to assess growth data in samples representing 0 to 3+ year classes. LWR indicated positive allometric growth in males and females of both rivers. Asymptotic length (L ¥ ) and growth co-efficient (K) were 22.5 cm and 0.5 year )1 for the Betwa River; and 23.6 cm and 0.6 year )1 for the Ken River. Growth performance index (øÕ) was higher in the Ken than in the Betwa. Reproduction was between June and September and GSI of both sexes were maximal in mid-June, thereafter declining until September. Mean size at first sexual maturity was 12.2 cm (n = 12) for females and 13.2 cm (n = 8) for males in the Betwa, and 12.5 cm (n = 13) TL for females and 13.1 cm (n = 9) TL for males in the Ken. The exploitation level (E) and maximum allowable exploitation (E max ) limit of L. boggut was 0.23 and 0.36 in the Betwa, whereas it was 0.33 and 0.37 in the Ken. These presented biological traits and population characters of L. boggut from both rivers provide first basic information for use in future assessment and conservation planning.

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Section: Discussionsupporting

confidence: 86%

Population structure and reproductive biology of a freshwater fish, Labeo boggut (Sykes, 1839), from two perennial rivers of Yamuna basin

Sarkar

Kumar

Dubey

et al. 2011

Journal of Applied Ichthyology

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“…Similar results were also reported for the closely related species, M. armatus by Serajuddin & Ali (2005). Although the basic feeding habit was almost identical, the intake of different food items showed variation in the present from those of Serajuddin & Ali (2005) and Suresh et al (2006).…”

Section: Resultscontrasting

confidence: 56%

FOOD AND FEEDING HABIT OF SPINY EEL Macrognathus aral (Bloch and Schneider) FROM UPPER ASSAM

Abujam¹

2013

J FisheriesSciences.com

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Food and feeding habits of for M. aral were studied by examining a total of 421 digestive tracts during August, 2008 and July, 2010. It is very important to know the feeding habits of the fish in the natural environment in order to conduct stock enhancement by releasing the seedlings, because prevention of starvation, improvements of their growth and effective management can be conducted from this knowledge. The results reveals that the lowest value of relative length of gut (RLG) was found as 0.58(±0.09) in 27-32 cm whereas the highest values as 0.62(±0.12) in 7-12 cm group. Fullness of gut was recorded as18.38% (full); 9.18% (¾ full); 11.23% (½ full); 12.54% (¼ full); 19.77% (nearly empty) and 28.9% (empty).

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“…In the present study, M. pancalus showed seasonality in reproduction, as had been reported previously (Suresh et al., ); however, our study differed in that it was done with fish from a river system for three consecutive years (April 2009–March 2012) and also demonstrated the histological changes in the ovary during different stages of the gonadal cycle, whereas the earlier study was done in a lake system for only 1 year and with no ovarian histology. The two studies also differed in the breeding periods, whereby it was longer at our latitude (February to September) than in the earlier study (February–July; Suresh et al., ), which could be due to different geographical conditions.…”

Section: Discussionsupporting

confidence: 65%

“…The non‐availability of males in certain months could not be explained in our study. One possibility could be post‐spawning mortality (Suresh et al., ), the other could be differences in the seasons and fishing grounds (Wu et al., ).…”

Section: Discussionmentioning

confidence: 99%

“…Earlier studies on this species have been done on the aspects of its reproductive biology in lake waters (Suresh et al., ), food and feeding habits (Serajuddin and Ali, ), sexual dimorphism (Swarup et al., ), maturity and fecundity (Karim and Hossain, ) and its systematics and distribution (Talwar and Jhingran, ). However, a long‐term (more than a year) study on the annual reproductive cycle of the spiny eel along with its ovarian histology has never been done in a river system.…”

Section: Introductionmentioning

confidence: 99%

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Spawning behaviour of barred spiny eel, Macrognathus pancalus, in the River Gomti, India

2013

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SummaryThe present study investigated the spawning behaviour of the spiny eel, Macrognathus pancalus, and its relationship with the environment (photoperiod and temperature). The results show that M. pancalus breeds during February to September with peak spawning during February/March and July/August, indicating two main breeding periods. Initiation of breeding occurs during increasing day lengths in early spring (February/March), and regression during decreasing day lengths in autumn (September/October). The breeding status confirmed by gonadosomatic index (GSI) and ovarian histology showed six stages of ovarian maturation (viz. stage I: chromatin nucleaolar; II: perinucleolar; III: cortical alveolar; IV: vitellogenesis; V: ripe; and VI: partially spent), with predominance of one or more stages at a particular time of the year. Males also followed a similar seasonal pattern in gonadal maturation as reflected by their GSI. Results show that M. pancalus is a seasonal breeder with bimodal spawning activity. The breeding pattern suggests an influence of prevailing day length conditions at this latitude.

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Biology and fishery of barred spiny eel, Macrognathus pancalus Hamilton

Cited by 26 publications

References 13 publications

Population structure and reproductive biology of a freshwater fish, Labeo boggut (Sykes, 1839), from two perennial rivers of Yamuna basin

Population structure and reproductive biology of a freshwater fish, Labeo boggut (Sykes, 1839), from two perennial rivers of Yamuna basin

FOOD AND FEEDING HABIT OF SPINY EEL Macrognathus aral (Bloch and Schneider) FROM UPPER ASSAM

Spawning behaviour of barred spiny eel, Macrognathus pancalus, in the River Gomti, India

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