First records of the seven‐gilled Notorynchus cepedianus and six‐gilled Hexanchus griseus sharks (Chondrichthyes: Hexanchiformes: Hexanchidae) found in the Galápagos Marine Reserve

2020 ◽  
Vol 97 (3) ◽  
pp. 926-929 ◽  
Author(s):  
Salome Buglass ◽  
Shannon Nagy ◽  
David Ebert ◽  
Paulina Sepa ◽  
Alan Turchik ◽  
...  
Keyword(s):  
Marine Reserve ◽  
Galapagos Marine Reserve ◽  
Hexanchus Griseus

scholarly journals Factors affecting relative abundance of low-mobility fishing resources: spiny lobster in the Galapagos Marine Reserve

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e7278 ◽  
Author(s):  
Juan Carlos Murillo-Posada ◽  
Silvia Salas ◽  
Iván Velázquez-Abunader
Keyword(s):  
Monitoring System ◽  
Relative Abundance ◽  
Spatial Scales ◽  
Marine Reserve ◽  
Spiny Lobster ◽  
Fishing Effort ◽  
Additive Models ◽  
Catch Per Unit Effort ◽  
Monthly Basis ◽  
Galapagos Marine Reserve

Management of low-mobility or benthic fisheries is a difficult task because variation in the spatial distribution and population dynamics of the resources make the monitoring and assessment of these fisheries challenging. We assumed that environmental, spatial, and temporal factors can contribute to the variability of the relative abundance of such species; we used Generalized Additive Models for Location Scale and Shape (GAMLSS) to test this hypothesis using as a case study the lobster fishery (targeting two species) in the Galapagos Marine Reserve, Ecuador. We gathered data on each of the two species of lobster on a monthly basis over seven years, including: (a) onboard observers’ records of catch data, fishing effort, and ground location by trip, and (b) data from interviews undertaken with fishers at their arrival to port, recording the same type of information as obtained from onboard observers. We use this information to analyze the effect of the measured variables and to standardize the Catch per Unit Effort (CPUE) in each case, using the GAMLSS. For both species, the temperature, region, fishing schedule, month, distance, and the monitoring system were significant variables of the selected models associated with the variability of the catch rate. ForPanulirus penicillatus, CPUE was higher at night than during the day, and forPanulirus gracilisit was higher during the day. Increased temperature resulted in a decrease of CPUE values. It was evident that temporal, spatial scales and monitoring system can influence the variability of this indicator. We contend that the identification of drivers of change of relative abundance in low-mobility species can help to support the development of monitoring and assessment programs for this type of fisheries.

Are boat strikes a threat to sea turtles in the Galapagos Marine Reserve?

2013 ◽  
Vol 80 ◽  
pp. 29-35 ◽  
Author(s):  
Judith Denkinger ◽  
Macarena Parra ◽  
Juan Pablo Muñoz ◽  
Constanza Carrasco ◽  
Juan Carlos Murillo ◽  
...  
Keyword(s):  
Sea Turtles ◽  
Marine Reserve ◽  
Galapagos Marine Reserve

Bias in evaluating the effects of marine protected areas: the importance of baseline data for the Galapagos Marine Reserve

2004 ◽  
Vol 31 (3) ◽  
pp. 212-218 ◽  
Author(s):  
G.J. EDGAR ◽  
R.H. BUSTAMANTE ◽  
J.-M. FARIÑA ◽  
M. CALVOPIÑA ◽  
C. MARTÍNEZ ◽  
...  
Keyword(s):  
Protected Areas ◽  
Marine Protected Areas ◽  
Marine Reserve ◽  
Baseline Data ◽  
Important Species ◽  
Fishery Resource ◽  
Political Processes ◽  
High Level ◽  
Conservation Zones ◽  
Galapagos Marine Reserve

Analysis of ecological baseline data collected for key resource species within the Galapagos Marine Reserve indicates that variation in animal density associated with the location of fully protected zones can be comparable to protected area effects. Even with a high level of interspersion between conservation, tourism and fishing management zones, major differences in densities of economically important species were evident between zone types prior to enforcement of fishing restrictions. Densities of the most valuable fishery resource, sea cucumbers, were three times higher in zones that remained open to fishing compared to ‘no-take’ conservation zones, and densities of sharks were five times higher in tourism zones than fishing or conservation zones. These results highlight bias in the socio-political processes that can accompany selection of marine protected areas, where fishers attempt to minimize perceived impacts on their livelihood by locating large protected zones in resource-poor areas, and tourism operators and sport divers argue for protection of areas containing atypically-interesting features. Bias in the location of fully protected zones can seriously confound ‘control-impact’ field investigations when data prior to prohibitions on fishing are lacking, including meta-analyses, which are dominated by such potentially systematically biased studies.

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