Crocodile Farming and Its Present State in Global Aquaculture

Tosun, Deniz Devrim

doi:10.3153/jfscom.2013005

Cited by 10 publications

(13 citation statements)

References 23 publications

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“…Die teel van Nylkrokodille is van groot kommersiële belang in suidelike Afrika, vanweë die gesogtheid van hul leer (Fergusson, 2010;Tosun, 2013). Die oorlewing en groei van broeilinge het 'n impak op die aantal en grootte van krokodille wat geslag word vir hul velle en daarom op leerproduksie en die ekonomie daarvan (Isberg et al, 2005).…”

Section: Inleidingunclassified

Die verband tussen broeilingmassa en eiervolume in die Nylkrokodil (Crocodylus niloticus): Eiers se produktiwiteit varieer

Nöthling

Nothling

Myburgh

2019

SATNT

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Die oorlewing en lewenskragtigheid van Nylkrokodil (Crocodylus niloticus) broeilinge is belangrik vir die sukses van kommersiële krokodilboerdery en die instandhouding van populasies in die natuur. In hierdie studie beskryf ons eers die verband tussen die massa van Nylkrokodilbroeilinge en die geskatte volume van die eier waaruit elkeen gebroei het. Daarna beskryf ons die variasie in die verhouding tussen die massa van individuele broeilinge en die volume van die eier waaruit elk gebroei het (die produktiwiteit van die eier) binne en tussen broeisels. Die volumes van 316 Nylkrokodileiers uit 51 broeisels is met ’n doelgemaakte algoritme geskat op grond van sleutelafmetings van die eiers wat op foto’s van die uitgebroeide eierdoppe gemaak is. Die broeiling wat uit elke eier gebroei het is direk na uitbroei geweeg. Nóg die duur van inkubering tot uitbroei (P = 0.88) nóg die jaar waarin broeisels gelê is (P = 0.35) nóg die aantal eiers in die broeisel (P = 0.57) het broeilingmassa beïnvloed. Daar bestaan ’n sterk, lineêre positiewe verband tussen die uitbroeimassa van Nylkrokodilbroeilinge en die geskatte volume van die eiers waaruit hulle gebroei het r = 0.88, P < 0.001, n =316). Sonder inagneming van geskatte eiervolume is 86.9% van die variasie in broeilingmassa die gevolg van variasie tussen broeisels en 13.1% die gevolg van variasie binne broeisels. Indien geskatte eiervolume in berekening gebring word is 59% van die variasie in broeilingmassa vir ’n bepaalde geskatte eiervolume die gevolg van variasie tussen broeisels en 41% die gevolg van variasie binne broeisels. Die produktiwiteit van eiers het van 0.57 g/ml tot 0.81 g/ml gevarieer, met 45.4% van die variasie wat tussen broeisels voorgekom het en 54.6% binne broeisels. Verdere navorsing is nodig om die verband tussen broeilingmassa en die groei van broeilinge, sowel as die verband tussen eierproduktiwiteit en die groei van broeilinge te ondersoek.

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Section: Inleidingunclassified

Die verband tussen broeilingmassa en eiervolume in die Nylkrokodil (Crocodylus niloticus): Eiers se produktiwiteit varieer

Nöthling

Nothling

Myburgh

2019

SATNT

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“…). The growing production of crocodile farming in the last decades has been mostly associated with the American alligator ( Alligator mississippiensis ) and the Nile crocodile ( Crocodylus niloticus ) (Tosun ). Culture practices usually start with egg harvesting, which is currently forbidden due to their endangered status, or purchasing eggs from existing farms.…”

Section: Other Applicationsmentioning

confidence: 99%

“…Crocodile skins for clothing and accessories Crocodile skin and claws are often used for clothing and accessories, which makes crocodile production a lucrative industry that has been mostly concentrated on the improvement of management and husbandry techniques, such as nutrition and housing (Isberg et al 2003). The growing production of crocodile farming in the last decades has been mostly associated with the American alligator (Alligator mississippiensis) and the Nile crocodile (Crocodylus niloticus) (Tosun 2012). Culture practices usually start with egg harvesting, which is currently forbidden due to their endangered status, or purchasing eggs from existing farms.…”

Section: Other Applicationsmentioning

confidence: 99%

Aquaculture of marine non‐food organisms: what, why and how?

Leal

Rocha

Rosa

et al. 2016

Reviews in Aquaculture

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Aquaculture is among the fastest growing industries in the world and the fastest in the food production sector. However, not all aquaculture organisms are produced for human consumption. Indeed, an important fraction of aquaculture products target a wide variety of applications, from pharmaceutical, cosmeceutical, ornamental and nutraceutical applications, as well as biofuel production, conservation efforts and academic purposes, among others. Despite the increasing importance of aquaculture for non‐food purposes, a comprehensive review covering the state of the art of this topic, its latest developments and future trends is missing. Here, we review what marine organisms are produced for non‐food purposes, as well as why and how they are produced. Instead of providing a thorough methodological review, production protocols are briefly summarized and an updated guide to the most relevant literature is provided. We overview current developments driving the aquaculture of non‐food organisms, underpin their most significant applications and highlight future prospects for non‐food aquaculture.

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“…They are apex predators found throughout South and East Asia and into Australasia [ 7 ]. Crocodylus porosus , like most other crocodilians, are poikilothermic, basking diurnally as a means of regulating internal body temperature [ 8 – 9 ]. Crocodilians are primarily nocturnal hunters [ 9 – 10 ]; however, they appear to exhibit a similar nocturnal ‘basking’ behavior [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

“…Crocodylus porosus , like most other crocodilians, are poikilothermic, basking diurnally as a means of regulating internal body temperature [ 8 – 9 ]. Crocodilians are primarily nocturnal hunters [ 9 – 10 ]; however, they appear to exhibit a similar nocturnal ‘basking’ behavior [ 11 ]. Whilst crocodilians are widely regarded as opportunistic feeders [ 12 – 13 ], their nocturnal hunting preferences are largely unknown.…”

Section: Introductionmentioning

confidence: 99%

Riparian vegetation structure and the hunting behavior of adult estuarine crocodiles

et al. 2017

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Riparian ecosystems are amongst the most biodiverse tropical habitats. They are important, and essential, ecological corridors, linking remnant forest fragments. In this study, we hypothesised that crocodile’s actively select nocturnal resting locations based on increased macaque predation potential. We examined the importance of riparian vegetation structure in the maintenance of crocodile hunting behaviours. Using airborne Light Detection and Ranging (LiDAR) and GPS telemetry on animal movement, we identified the repeated use of nocturnal resting sites by adult estuarine crocodiles (Crocodylus porosus) throughout the fragmented Lower Kinabatangan Wildlife Sanctuary in Sabah, Malaysia. Crocodile resting locations were found to resemble, in terms of habitat characteristics, the sleeping sites of long-tailed macaque; positioned in an attempt to avoid predation by terrestrial predators. We found individual crocodiles were actively selecting overhanging vegetation and that the protrusion of trees from the tree line was key to site selection by crocodiles, as well as influencing both the presence and group size of sleeping macaques. Although these findings are correlational, they have broad management implications, with the suggestion that riparian corridor maintenance and quality can have implications beyond that of terrestrial fauna. We further place our findings in the context of the wider ecosystem and the maintenance of trophic interactions, and discuss how future habitat management has the potential to mitigate human-wildlife conflict.

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Crocodile Farming and Its Present State in Global Aquaculture

Cited by 10 publications

References 23 publications

Die verband tussen broeilingmassa en eiervolume in die Nylkrokodil (Crocodylus niloticus): Eiers se produktiwiteit varieer

Die verband tussen broeilingmassa en eiervolume in die Nylkrokodil (Crocodylus niloticus): Eiers se produktiwiteit varieer

Aquaculture of marine non‐food organisms: what, why and how?

Riparian vegetation structure and the hunting behavior of adult estuarine crocodiles

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