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Benchmarking pre-spawning fitness, climate preferendum of some catfishes from river Ganga and its proposed utility in climate research

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Title Benchmarking pre-spawning fitness, climate preferendum of some catfishes from river Ganga and its proposed utility in climate research
Not Available
 
Creator Uttam Kumar Sarkar
Malay Naskar
Koushik Roy
Deepa Sudeeshan
Pankaj Srivastava
Sandipan Gupta
Arun Kumar Bose
Vinod Kumar Verma
Soma Das Sarkar
Gunjan Karnatak
Saurav Kumar Nandy
 
Subject Mystus tengara
Mystus cavasius
Mystus cavasius
Eutropiichthys vacha
Fulton’s condition factor
Kaplan- Meier survival fit
LOESS fit
Climate change
 
Description Not Available
The concept of threshold condition factor
(Fulton), beyond which more than 50% of the female
fish population may attain readiness for spawning
coined as pre-spawning fitness (Kspawn50), has been
proposed in the present article and has been estimated
by applying the non-parametric Kaplan-Meier method
for fitting survival function. A binary coding strategy of
gonadal maturity stages was used to classify whether a
female fish is Bready to spawn^ or not. The proposed
Kspawn50 has been generated for female Mystus tengara
(1.13–1.21 units), M. cavasius (0.846–0.945 units), and
Eutropiichthys vacha (0.716–0.799 units). Information
on the range of egg parameters (fecundity, egg weight,
egg diameter) expected at the pre-spawning stage was
also generated. Additional information on speciesspecific
thermal and precipitation window (climate
preferendum) within which Kspawn50 is attained was also
generated through the LOESS smoothing technique.
Water temperatures between 31 and 36 °C (M. tengara),
30 and 32 °C (M. cavasius), and 29.5 and 31 °C
(E. vacha) and monthly rainfall between 200 and
325 mm (M. tengara), > 250 mm (M. cavasius), and
around 50mm and between 350 and 850 mm(E. vacha)
were found to be optimum for attainment of Kspawn50.
The importance of parameterization and benchmarking of Kspawn50 in addition to other conventional reproductive
biology parameters has been discussed in
the present article. The purposes of the present study
were fulfilled by generating baseline information
and similar information may be generated for other
species replicating the innovative methodology used
in this study.
Not Available
 
Date 2021-08-12T06:14:07Z
2021-08-12T06:14:07Z
2017-09-07
 
Type Research Paper
 
Identifier Sarkar, U. K., Naskar, M., Roy, K., Sudeeshan, D., Srivastava, P., Gupta, S., ... & Nandy, S. K. (2017). Benchmarking pre-spawning fitness, climate preferendum of some catfishes from river Ganga and its proposed utility in climate research. Environmental monitoring and assessment, 189(10), 1-13.
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/55231
 
Language English
 
Relation Not Available;
 
Publisher Springer