Conservation and management-oriented ecological research in the coastal zone of Baja California, Mexico

1999 ◽  
Vol 5 (1) ◽  
pp. 43-50 ◽  
Author(s):  
Escofet Anamaria ◽  
Espejel Ileana
Keyword(s):  
Coastal Zone ◽  
Baja California ◽  
Ecological Research ◽  
Conservation And Management

scholarly journals Conservation and management of humpback dolphins: the South African perspective

Oryx ◽  
2000 ◽  
Vol 34 (3) ◽  
pp. 207-216 ◽  
Author(s):  
Leszek Karczmarski
Keyword(s):  
Coastal Zone ◽  
Population Biology ◽  
Site Fidelity ◽  
Coastal Zone Management ◽  
Seasonal Migration ◽  
Multiple Use ◽  
Narrow Strip ◽  
Population Growth Rates ◽  
Zone Management ◽  
Conservation And Management

AbstractPopulation biology and socio-ecology of Indo-Pacific humpback dolphins Sousa chinensis were investigated during a 3-year study period in the Algoa Bay region, South Africa. The dolphins inhabit a narrow strip of coastal waters, mostly less than 15 m deep. Groups are small (mean = 7 animals) and their daily activities concentrate around shallow rocky reefs—the primary feeding grounds. Dependence on these restricted, shallow-water habitats is evident throughout the year. Site fidelity is generally weak and is subject to seasonal migration, although female site fidelity seems to be related to reproductive stage. Births occur predominantly in summer. The social system is highly fluid, structured to some degree by sex and age, ‘matesearching’ behaviour being the most likely male reproductive strategy. The dolphins inhabiting Algoa Bay are part of a substantially larger population that uses a considerable length of the coastal zone. Estimated population parameters are generally low, as are modelled population growth rates, and an increase in the population size seems unlikely. Humpback dolphins appear to be vulnerable to negative environmental pressure and the alteration/destruction of inshore habitats is probably among the greatest threats to them. Conservation of this species should be given high priority and be seen as an important part of integrated coastal zone management. Establishment of multiple-use management areas with controlled ecotourism and several priority sites declared as strict reserves seems to be the most effective conservation approach. In order to be successful, conservation and management policies need to recognize the needs and lifestyles of the local inhabitants.

scholarly journals Missing pieces in the full annual cycle of fish ecology: a systematic review of the phenology of freshwater fish research

2020 ◽  
Author(s):  
Megan E. Brady ◽  
Andrew M. Chione ◽  
Jonathan B. Armstrong
Keyword(s):  
Freshwater Fish ◽  
Pacific Salmon ◽  
Fish Ecology ◽  
Ecological Research ◽  
Seasonal Interactions ◽  
Seasonal Timing ◽  
Temporal Aspects ◽  
Juvenile Pacific Salmon ◽  
Carry Over ◽  
Conservation And Management

AbstractIn recent decades, fish ecologists have become increasingly aware of the need for spatially comprehensive sampling. However, a corresponding reflection on the temporal aspects of research has been lacking. We quantified the seasonal timing and extent of freshwater fish research. Since reviewing all prior work was not feasible, we considered two different subsets. First, we compiled the last 30 years of ecological research on juvenile Pacific salmon and trout (Oncorhynchus spp.) (n = 371 studies). In addition to the aggregate, we compared groups classified by subject matter. Next, to evaluate whether riverscape ecology has embraced space at the expense of time, we compiled research across taxa in which fish were enumerated in a spatially continuous fashion (n = 46). We found that ecological Oncorhynchus spp. research was biased towards summer (40% occurred during June-August) and the month of June in particular, at the expense of winter work (only 13% occurred during December-February). Riverscape studies were also biased toward summer (47% of studies) and against winter (11%). It was less common for studies to encompass multiple seasons (43% of ecological Oncorhynchus spp. studies and 54% of riverscape studies) and most were shorter than 4 months (73% of ecological Oncorhynchus spp. studies and 81% of riverscape studies). These temporal biases may cause researchers to overemphasize ecological phenomena observed during summer and limit our ability to recognize seasonal interactions such as carry-over effects or compensatory responses. Full year and winter studies likely hold valuable insights for conservation and management.

scholarly journals Impacts of the 2014–2015 Warm‐Water Anomalies on Nutrients, Chlorophyll‐ a and Hydrographic Conditions in the Coastal Zone of Northern Baja California

2020 ◽  
Vol 125 (12) ◽  
Author(s):  
F. Delgadillo‐Hinojosa ◽  
A. Félix‐Bermúdez ◽  
E. V. Torres‐Delgado ◽  
R. Durazo ◽  
V. Camacho‐Ibar ◽  
...  
Keyword(s):  
Chlorophyll A ◽  
Coastal Zone ◽  
Baja California ◽  
Warm Water ◽  
Hydrographic Conditions

scholarly journals Synthesis of the first 10 years of long-term ecological research in Amazonian Forest ecosystem – implications for conservation and management

2015 ◽  
Vol 13 (1) ◽  
pp. 3-14 ◽  
Author(s):  
Fernanda V. Costa ◽  
Flávia R.C. Costa ◽  
William E. Magnusson ◽  
Elizabeth Franklin ◽  
Jansen Zuanon ◽  
...  
Keyword(s):  
Forest Ecosystem ◽  
Ecological Research ◽  
Amazonian Forest ◽  
Long Term Ecological Research ◽  
Conservation And Management
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