Sea turtle tourism and conservation

Lamb, Gavin

doi:10.4324/9781003041955-8

Cited by 1 publication

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is important from the standpoint of conservation as rapid declines in C. guttata , due to factors such as habitat loss and the pet trade, have reduced the number of populations (Van Dijk, 2011). In our area, populations are typically 30–40 km apart (Lamb, 2018). Despite dispersal typically occurring within 25 km in our study between our nearest populations, it is still unclear if populations are becoming more genetically isolated.…”

Section: Discussionmentioning

confidence: 99%

“…We note that the largest distance between C. guttata to the maximum 25 km distance was 17 km and the smallest distance in the 25–50 km distance class was 30 km, so where in this 17–30 km range is too far for most C. guttata to travel is still to be determined. Little is known about dispersal distances in C. guttata , so knowledge that C. guttata rarely disperse to different sites beyond 17–30 km may be relevant to conservation of this species, as is determining if other landscape factors (e.g., large roads, rivers, and farmland) affect dispersal (Lamb, 2018).…”

Section: Discussionmentioning

confidence: 99%

“…Wetlands located within this region have no geographic interactions with other wetlands (Tiner, 2003). But while these wetlands are not contiguous and landscapes between wetlands are not suitable habitat for C. guttata , the connective landscapes are potentially permeable to C. guttata and other turtle movements to some degree (Lamb, 2018). Each site contains breeding habitat for C. guttata in the form of vernal pools and/or roadside ditches, which typically fill in the wet season and then dry out in most years and forested terrestrial habitat occupied in the non‐breeding season (reviewed in Ernst & Lovich, 2009).…”

Section: Methodsmentioning

confidence: 99%

“…We calculated observed and expected heterozygosities ( H O and H E , respectively) and number of alleles per locus (Table 2) and H O , H E and the number of rarified alleles per locus per population (sensu Kalinowski, 2004, 2005; Table 3). We then used the linkage disequilibrium method (LDNe) implemented in N e ESTIMATOR (v2.01, Do et al, 2014) to estimate effective population size ( N e ) for each site and compared N e to mark‐recapture estimates of population size ( N c ; sensu Frankham, 1995; Nunney, 1995), calculated with the POPAN estimator in Program MARK (Cooch & White, 2005; White & Burnham, 1999) in Lamb (2018).…”

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations

(Not) far from home: No sex bias in dispersal, but limited genetic patch size, in an endangered species, the Spotted Turtle (Clemmys guttata)

Liebgold

Dickey

Lamb

et al. 2023

Ecology and Evolution

View full text Add to dashboard Cite

Sex‐biased dispersal is common in many animals, with male‐biased dispersal often found in studies of mammals and reptiles, including interpretations of spatial genetic structure, ostensibly as a result of male–male competition and a lack of male parental care. Few studies of sex‐biased dispersal have been conducted in turtles, but a handful of studies, in saltwater turtles and in terrestrial turtles, have detected male‐biased dispersal as expected. We tested for sex‐biased dispersal in the endangered freshwater turtle, the spotted turtle ( Clemmys guttata ) by investigating fine‐scale genetic spatial structure of males and females. We found significant spatial genetic structure in both sexes, but the patterns mimicked each other. Both males and females typically had higher than expected relatedness at distances <25 km, and in many distance classes greater than 25 km, less than expected relatedness. Similar patterns were apparent whether we used only loci in Hardy–Weinberg equilibrium ( n = 7) or also included loci with potential null alleles ( n = 5). We conclude that, contrary to expectations, sex‐biased dispersal is not occurring in this species, possibly related to the reverse sexual dimorphism in this species, with females having brighter colors. We did, however, detect significant spatial genetic structure in males and females, separate and combined, showing philopatry within a genetic patch size of <25 km in C. guttata , which is concerning for an endangered species whose populations are often separated by distances greater than the genetic patch size.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%