Demographics of the endemic and threatened small cyprinid Pethia setnai from the Northern Western Ghats, India
M. SriHari
A , Y. Gladston B , S. M. Ajina B , G. B. Sreekanth C , Rajeev Raghavan D and A. K. Jaiswar A E
A Department of Fisheries Resource Management, ICAR – Central Institute of Fisheries Education, Mumbai, 400 061, India.
B Fisheries Division, ICAR – Central Island Agricultural Research Institute, Port Blair, Andaman, 744 101, India.
C ICAR – Central Coastal Agricultural Research Institute, Old Goa, 403 402, Goa.
D Department of Fisheries Resource Management, Kerala University of Fisheries and Ocean Studies, Kochi, 682 506, India.
E Corresponding author: akjaiswar@cife.edu.in
Marine and Freshwater Research 71(7) 810-813 https://doi.org/10.1071/MF19122
Submitted: 8 April 2019 Accepted: 5 August 2019 Published: 12 November 2019
Abstract
The indigo barb Pethia setnai is a threatened small cyprinid endemic to the Western Ghats biodiversity hotspot of India. In this study, the length–weight relationship and length–frequency-based population dynamics of this species, which are important prerequisites for effective fisheries management, were investigated for the first time based on specimens collected from the Mhadei River in the northern part of the Western Ghats. Estimated von Bertalanffy growth parameters were as follows: theoretical maximum length, L∞, 70.88 mm; growth coefficient, k, 1.50 year–1; and theoretical age at length 0, t0, –0.016 years. Natural mortality of P. setnai was higher than fishing mortality, and the present exploitation level (0.37) was less than 60% of the predicted maximum exploitation, suggesting that the species is not exploited to a level that is detrimental to the local population.
Additional keywords: aquarium trade, exploitation, indigo barb, mortality, population dynamics.
References
Beverton, R. J. H., and Holt, S. J. (1959). A review of the lifespans and mortality rates of fish in nature, and their relation to growth and other physiological characteristics. In ‘Ciba Foundation Symposium – the Lifespan of Animals (Colloquia on Ageing)’. (Eds G. E. W. Wolstenholme and C. M. O’Conner.) Vol. 5, pp. 142–180. (Wiley: Chichester, UK.)Beverton, R. J. H., and Holt, S. J. (1966). Manual of methods for fish stock assessment. Part II. Tables of yield functions. FAO Fisheries Technical Paper number 38, Review 1, Food and Agriculture Organization of the United Nations, Rome, Italy.
Chhapgar, B. F., and Sane, S. R. (1992). A new fish of the genus Puntius Hamilton (Ostariophysi: Cyprinidae) from Goa. Journal of the Bombay Natural History Society 89, 357–359.
Cushing, D. H. (1968). ‘Fisheries Biology. A Study of Population Dynamics.’ (University of Wisconsin Press: Madison, WI, USA.)
Dahanukar, N. (2015). Indigo barb Pethia setnai. In ‘The IUCN Red List of Threatened Species 2015’, e.T172411A70413385. (International Union for Conservation of Nature and Natural Resources.) Available at https://www.iucnredlist.org/species/172411/70413385 [Verified 6 February 2019].
Dahanukar, N., and Raghavan, R. (2013). Freshwater fishes of Western Ghats: checklist v 1.0 August 2013. In ‘Newsletter of IUCN SSC/WI Freshwater Fish Specialist Group – South Asia and the Freshwater Fish Conservation Network of South Asia (FFCNSA)’. (Eds S. Molur.) Vol. 1, pp. 6–16. (Zoo Outreach Organization: Coimbatore, India.)
Froese, R. (2006). Cube law, condition factor and weight–length relationships: history, meta-analysis and recommendations. Journal of Applied Ichthyology 22, 241–253.
| Cube law, condition factor and weight–length relationships: history, meta-analysis and recommendations.Crossref | GoogleScholarGoogle Scholar |
Gayanilo, F. C., Sparre, P., and Pauly, D. (2005). ‘The FAO-ICLARM Stock Assessment Tools II (FiSAT II). User’s Guide. Revised Version FAO Computerized Information Series (Fisheries): Vol. 8.’ (Food and Agriculture Organization of the United Nations: Rome, Italy.)
Katwate, U., Paingankar, M. S., Jadhav, S., and Dahanukar, N. (2013). Phylogenetic position and osteology of Pethia setnai (Chhapgar and Sane, 1992), an endemic barb (Teleostei: Cyprinidae) of the Western Ghats, India, with notes on its distribution and threats. Journal of Threatened Taxa 5, 5214–5227.
| Phylogenetic position and osteology of Pethia setnai (Chhapgar and Sane, 1992), an endemic barb (Teleostei: Cyprinidae) of the Western Ghats, India, with notes on its distribution and threats.Crossref | GoogleScholarGoogle Scholar |
Katwate, U., Kumkar, P., Raghavan, R., and Dahanukar, N. (2018). A new syntopic species of small barb from the Western Ghats of India (Teleostei: Cyprinidae). Zootaxa 4434, 529–546.
| A new syntopic species of small barb from the Western Ghats of India (Teleostei: Cyprinidae).Crossref | GoogleScholarGoogle Scholar | 30313178PubMed |
Le Cren, E. D. (1951). The length–weight relationship and seasonal cycle in gonad weight and condition in the perch (Perca fluviatilis). Journal of Animal Ecology 20, 201–219.
| The length–weight relationship and seasonal cycle in gonad weight and condition in the perch (Perca fluviatilis).Crossref | GoogleScholarGoogle Scholar |
Menon, A. G. K. (1999). Check list – fresh water fishes of India. Records of the Zooogical Survey of India, Miscellaneous Publication, Occasional Paper number 175, Kolkata, India.
Mitra, K., Suresh, V. R., Biswas, B. K., and Biswas, D. K. (2011). Biology, fishery and population dynamics of two spotted barb, Puntius ticto (Hamilton, 1822) from a floodplain wetland in lower Ganga basin. Indian Journal of Fisheries 43, 12–20.
Molur, S., Smith, K. G., Daniel, B. A., and Darwall, W. R. T. (Eds) (2011). ‘The Status and Distribution of Freshwater Biodiversity in the Western Ghats, India.’ (International Union for Conservation of Nature and Natural Resources: Cambridge, UK, and Gland, Switzerland; and Zoo Outreach Organisation: Coimbatore, India.)
Mustafa, M. G., and de Graaf, G. (2008). Population parameters of important species in inland fisheries of Bangladesh. Asian Fisheries Science 21, 147–158.
Pauly, D. (1980). On the interrelationships between natural mortality, growth parameters and mean environmental temperature in 175 fish stocks. Journal du Conseil - Conseil International pour l’Exploration de la Mer 39, 175–192.
| On the interrelationships between natural mortality, growth parameters and mean environmental temperature in 175 fish stocks.Crossref | GoogleScholarGoogle Scholar |
Pauly, D. (1983). Length-converted catch curves: a powerful tool for fisheries research in the tropics (part 1). Fishbyte 1, 9–13.
Pauly, D. (1984). Fish population dynamics in tropical waters: a manual for use with programmable calculators. ICLARM Studies and Reviews 8, 325.
Pauly, D., and Munro, J. L. (1984). Once more on the comparison of growth in fish and invertebrate. ICLARM Fishbyte 2, 1–21.
Raghavan, R., Dahanukar, N., Tlusty, M. F., Rhyne, A. L., Kumar, K. K., Molur, S., and Rosser, A. M. (2013). Uncovering an obscure trade: threatened freshwater fishes and the aquarium pet markets. Biological Conservation 164, 158–169.
| Uncovering an obscure trade: threatened freshwater fishes and the aquarium pet markets.Crossref | GoogleScholarGoogle Scholar |
Raghavan, R., Ali, A., Philip, S., and Dahanukar, N. (2018). Effect of unmanaged harvests for the aquarium trade on the population status and dynamics of redline torpedo barb: a threatened aquatic flagship. Aquatic Conservation 28, 567–574.
| Effect of unmanaged harvests for the aquarium trade on the population status and dynamics of redline torpedo barb: a threatened aquatic flagship.Crossref | GoogleScholarGoogle Scholar |
Rikhter, V. A., and Efanov, V. N. (1976). On one of the experimental determination of the selection of natural mortality of fish populations. ICNAF Reseach Document 76, International Commission for the Northwest Atlantic Fisheries.
