Red Abalone, Haliotis Rufescens, Relative Impacts of Recreational Fisheries and Sea Otter Predation on the Abundance, Size Frequency and Microhabitat Distribution of Red Abalone Populations in Central and Northern California
Title | Red Abalone, Haliotis Rufescens, Relative Impacts of Recreational Fisheries and Sea Otter Predation on the Abundance, Size Frequency and Microhabitat Distribution of Red Abalone Populations in Central and Northern California PDF eBook |
Author | Samantha Pollard |
Publisher | |
Pages | 156 |
Release | 1992 |
Genre | Abalones |
ISBN |
A Review of Marine Zones in the Monterey Bay National Marine Sanctuary
Title | A Review of Marine Zones in the Monterey Bay National Marine Sanctuary PDF eBook |
Author | Jennifer A. Brown |
Publisher | |
Pages | 286 |
Release | 2001 |
Genre | Marine parks and reserves |
ISBN |
Third California Islands Symposium
Title | Third California Islands Symposium PDF eBook |
Author | F. G. Hochberg |
Publisher | |
Pages | 688 |
Release | 1993 |
Genre | Travel |
ISBN |
Workshop on Rebuilding Abalone Stocks in British Columbia
Title | Workshop on Rebuilding Abalone Stocks in British Columbia PDF eBook |
Author | Alan Campbell |
Publisher | NRC Research Press |
Pages | 178 |
Release | 2000 |
Genre | Business & Economics |
ISBN | 9780660182926 |
An international Workshop on Rebuilding Abalone Stocks in British Columbia was held during February 23-26 , 1999, in Nanaimo, British Columbia, Canada. The main goal of the workshop was to develop a realistic strategy to rehabilitate depleted northern (pinto) abalone, Haliotis kamtschatkana, stocks in British Columbia. The workshop was also meant to clarify the roles, expectations, and shared interests of many of the interest groups in British Columbia,emphasizing the key role in the rebuilding plan of local communities,including First Nations and non-native communities.
Negatively Correlated Abundance Suggests Competition Between Red Abalone (Haliotis Rufescens) and Red Sea Urchins (Mesocentrotus Franciscanus) Inside and Outside Established MPAs Closed to Commercial Sea Urchin Harvest in Northern California
Title | Negatively Correlated Abundance Suggests Competition Between Red Abalone (Haliotis Rufescens) and Red Sea Urchins (Mesocentrotus Franciscanus) Inside and Outside Established MPAs Closed to Commercial Sea Urchin Harvest in Northern California PDF eBook |
Author | Johnathan Centoni |
Publisher | |
Pages | 61 |
Release | 2018 |
Genre | Red abalone |
ISBN |
Red abalone and sea urchins are both important herbivores that potentially compete with each other for resources like food and space along the California coast. Red abalone supported a socioeconomically important recreational fishery during this study (which was closed in 2018) and red sea urchins support an important commercial fishery. Both red sea urchins and red abalone feed on the same macroalgae (including Pterygophora californica, Laminaria setchellii, Stephanocystis osmundacea, Costaria costata, Alaria marginata, Nereocystis leutkeana), and a low abundance of this food source during the period of this project may have created a highly competitive environment for urchins and abalone. Evidence that suggests competition between red abalone and red sea urchins can be seen within data collected during the years of this study (2014-2016): a significantly higher red sea urchin density, concomitant with a significantly lower red abalone density, was observed within areas closed to commercial sea urchin harvest (in MPAs) compared to nearby reference areas open to sea urchin harvest. In addition, a significant negative relationship was found between red abalone and red sea urchin abundances when examined at the 60 m2 transect level: transects with higher abundances of red sea urchins contained fewer red abalone. Designating MPAs that are closed to sea urchin harvest, in the absence of sea urchin predators such as sunflower stars (Pycnopodia helianthoides), sea otters (Enhydra lutris), spiny lobster (Panulirus interruptus), and predatory fish species, (such as the sheephead (Semicossyphus pulcher) found in Southern California), may all have contributed to an increase in red sea urchin abundances and a concomitant decrease in red abalone within the Cabrillo MPA studied in this project.
Endangered Species Update
Title | Endangered Species Update PDF eBook |
Author | |
Publisher | |
Pages | 400 |
Release | 1996 |
Genre | Endangered species |
ISBN |
Final Environmental Impact Statement for Translocation of Southern Sea Otters: Technical support documents
Title | Final Environmental Impact Statement for Translocation of Southern Sea Otters: Technical support documents PDF eBook |
Author | |
Publisher | |
Pages | 182 |
Release | 1987 |
Genre | Animal introduction |
ISBN |