Fish genetics and conservation research in India: status and perspectives

Lakra, W. S.; Mohindra, Vindhya; Lal, Kuldeep K.

doi:10.1007/s10695-007-9168-z

Cited by 26 publications

(18 citation statements)

References 45 publications

(29 reference statements)

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“…The exploitation rates ( E ) of RLTBs in three rivers (Chalakudy, Periyar, and Valapattanam) are higher than 0.5, indicating overfishing, whereas the exploitation level in the Periyar River almost equals the predicted E max , indicating that local populations are under extremely high fishing pressure and are vulnerable to collapse, unless management plans are implemented urgently. Genetic bottlenecks detected for the RLTBs in the rivers Valapatanam and Chalakudy (Lakra, Mohindra, & Lal, ) could therefore be attributed to high fishing pressure and exploitation rates. In all but one river, (Periyar), the lengths at first capture ( L c ) of the RLTBs were less than their mean sizes at first maturity, suggesting the possible occurrence of growth overfishing.…”

Section: Discussionmentioning

confidence: 99%

Effect of unmanaged harvests for the aquarium trade on the population status and dynamics of redline torpedo barb: A threatened aquatic flagship

Raghavan

Ali

Philip

et al. 2018

Aquatic Conservation

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1. The freshwater aquarium trade provides economic and livelihood opportunities to the rural poor, but has been implicated in biodiversity loss through population declines and local extirpation of high-value endemic species. Previous observations on population declines are largely based on anecdotal data, however, and there are no studies on the population dynamics or stock assessment of freshwater fish species collected for the aquarium pet trade.2. To understand how wild collection of endemic and threatened species for the aquarium trade could affect their populations, the sustainability of collecting the endangered redline torpedo barb (Sahyadria denisonii), and its evolutionarily distinct lineages (henceforth RLTBs), from the Western Ghats region (part of the Western Ghats-Sri Lanka biodiversity hot spot) for the aquarium trade was studied to provide baseline data to inform conservation action.3. Local populations of RLTBs at the five commercial collection sites showed high mortality rates, and fish were exploited before they attained sexual maturity. The unmanaged fishery has led to unsustainable levels of exploitation, and populations of RLTBs at three sites are vulnerable to an impending collapse. 4. Endemic and threatened freshwater fish species used in the aquarium pet trade are exposed to local extirpations and global extinctions unless management plans and legislative controls are implemented and strictly enforced. Management plans and conservation actions to help guide the responsible fisheries of RLTBs are suggested, and the wider implications of unmanaged exploitation of endemic aquarium fisheries are discussed.

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Section: Discussionmentioning

confidence: 99%

Effect of unmanaged harvests for the aquarium trade on the population status and dynamics of redline torpedo barb: A threatened aquatic flagship

Raghavan

Ali

Philip

et al. 2018

Aquatic Conservation

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“…Species-specific sperm cryopreservation protocols have been developed for 14 species at NBFGR, Lucknow, India. The technique has been tested for 12 species through the production of progeny using cryopreserved sperm [28]. Cryopreservation of fish sperm is relatively common in the breeding and management of fish species, including salmonid, cyprinids, silurids, sturgeons [29][30][31][32].The creation of a cryopreserved sperm bank is an effective strategy for protecting the biodiversity of fish population and provides the opportunity to preserve the sperm samples of the most valuable males, which can be used in reproductive technologies in hatchery conditions.…”

Section: Sperm Preservationmentioning

confidence: 99%

Bio-banking: An Emerging Approach for Conservation of Fish Germplasm

Goswami¹,

Mishra²,

Ns³

et al. 2016

Poult Fish Wildl Sci

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Global biodiversity is declining with substantial losses of populations, species and habitats causing a significant impact on human life. Holistic and integrated approach for biodiversity conservation requires concrete and urgent action. Although there is increasing concern over the loss of species and degradation of habitat, still more innovative efforts are required. Biobanking holds immense promise to provide biomaterial for conservation of fish germplasm. Establishment of repositories along with gene banks could provide opportunities for collaboration among the leading experts in the fields of fish ecology, physiology, and cryobiology to synthesize effective ways for conservation of fish genetic resources, and discuss what needs to be done to increase the impact in the next century. The article reviews different causes for loss of fish biodiversity, the ways to overcome the situation and advocates cell line repository as an alternative aid to conserve fish germplasm.

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“…Catches from several traditional collection centers increased during the years -2007. Since then, studies based on abundance, catch per unit effort, local knowledge and genetics have all concluded that the RLTBs have been severely overfished and become rare at traditional collection sites (Kurup and Radhakrishnan, 2006;Lakra et al, 2007;Raghavan et al, 2009). …”

Section: Collection and Export Of Rltbsmentioning

confidence: 99%

Uncovering an obscure trade: Threatened freshwater fishes and the aquarium pet markets

Raghavan

Dahanukar

Tlusty

et al. 2013

Biological Conservation

151

102

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a b s t r a c tWhile the collection of fish for the aquarium pet trade has been flagged as a major threat to wild populations, this link is tenuous for the unregulated wild collection of endemic species because of the lack of quantitative data. In this paper, we examine the extent and magnitude of collection and trade of endemic and threatened freshwater fishes from India for the pet markets, and discuss their conservation implications. Using data on aquarium fishes exported from India, we try to understand nature of the trade in terms of species composition, volume, exit points, and importing countries. Most trade in India is carried out under a generic label of ''live aquarium fish''; yet despite this fact, we extracted export data for at least thirty endemic species that are listed as threatened in the IUCN Red List. Of the 1.5 million individual threatened freshwater fish exported, the major share was contributed by three species; Botia striata (Endangered), Carinotetraodon travancoricus (Vulnerable) and the Red Lined Torpedo Barbs (a species complex primarily consisting of Puntius denisonii and Puntius chalakkudiensis, both 'Endangered'). Using the endangered Red Lined Torpedo Barbs as a case study, we demonstrate how existing local regulations on aquarium fish collections and trade are poorly enforced, and are of little conservation value. In spite of the fact that several threatened and conservation concern species are routinely exported, India has yet to frame national legislation on freshwater aquarium trade. Our analysis of the trade in wild caught freshwater fishes from two global biodiversity hotspots provides a first assessment of the trade in endangered and threatened species. We suggest that the unmanaged collections of these endemic species could be a much more severe threat to freshwater biodiversity than hitherto recognized, and present realistic options for management.

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Fish genetics and conservation research in India: status and perspectives

Cited by 26 publications

References 45 publications

Effect of unmanaged harvests for the aquarium trade on the population status and dynamics of redline torpedo barb: A threatened aquatic flagship

Effect of unmanaged harvests for the aquarium trade on the population status and dynamics of redline torpedo barb: A threatened aquatic flagship

Bio-banking: An Emerging Approach for Conservation of Fish Germplasm

Uncovering an obscure trade: Threatened freshwater fishes and the aquarium pet markets

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