Observations on the swarming habits and lunar periodicity ofPlatynereis sp. from the Madras Harbour

1937 ◽  
Vol 5 (6) ◽  
pp. 245-260
Author(s):  
R. Gopala Aiyar ◽  
N. Kesava Panikkar
Keyword(s):  
Lunar Periodicity

Cathemerality and Lunar Periodicity of Activity Rhythms in Owl Monkeys of the Argentinian Chaco

2006 ◽  
Vol 77 (1-2) ◽  
pp. 123-138 ◽  
Author(s):  
Eduardo Fernandez-Duque ◽  
Hans G. Erkert
Keyword(s):  
Lunar Periodicity ◽  
Activity Rhythms ◽  
Owl Monkeys

Hormonal changes in relation to lunar periodicity in the testis of the forktail rabbitfish, Siganus argenteus

2003 ◽  
Vol 131 (3) ◽  
pp. 302-309 ◽  
Author(s):  
Md Saydur Rahman ◽  
Masaya Morita ◽  
Akihiro Takemura ◽  
Kazunori Takano
Keyword(s):  
Hormonal Changes ◽  
Lunar Periodicity

Integrating indigenous ecological knowledge and customary sea tenure with marine and social science for conservation of bumphead parrotfish (Bolbometopon muricatum) in the Roviana Lagoon, Solomon Islands

2004 ◽  
Vol 31 (1) ◽  
pp. 69-83 ◽  
Author(s):  
SHANKAR ASWANI ◽  
RICHARD J. HAMILTON
Keyword(s):  
Social Science ◽  
Solomon Islands ◽  
Management Strategies ◽  
Ecological Knowledge ◽  
Small Fish ◽  
Lunar Periodicity ◽  
The People ◽  
Indigenous Ecological Knowledge ◽  
Sea Tenure ◽  
Bolbometopon Muricatum

Indigenous ecological knowledge and customary sea tenure may be integrated with marine and social science to conserve the bumphead parrotfish (Bolbometopon muricatum) in the Roviana Lagoon, Western Solomon Islands. Three aspects of indigenous ecological knowledge in Roviana were identified as most relevant for the management and conservation of bumphead parrotfish, and studied through a combination of marine science and anthropological methods. These were (1) local claims that fishing pressure has had a significant impact on bumphead parrotfish populations in the Roviana Lagoon; (2) the claim that only small bumphead parrotfish were ever seen or captured in the inner lagoon and that very small fish were restricted to specific shallow inner-lagoon nursery regions; and (3) assertions made by local divers that bumphead parrotfish predominantly aggregated at night around the new moon period and that catches were highest at that time. The research supported claims (1) and (2), but did not support proposition (3). Although the people of the Roviana Lagoon had similar conceptions about their entitlement rights to sea space, there were marked differences among regional villages in their opinions regarding governance and actual operational rules of management in the Lagoon. Contemporary differences in management strategies resulted from people's historical and spatial patterns of settlement across the landscape and adjoining seascapes, and the attendant impact of these patterns on property relations. This was crucial in distinguishing between those villages that held secure tenure over their contiguous sea estates from those that did not. Indigenous ecological knowledge served to (1) verify that the bumphead parrotfish was a species in urgent need of protection; (2) explain how different habitats structured the size distribution of bumphead parrotfish; (3) identify sensitive locations and habitats in need of protection; and (4) explain the effect of lunar periodicity on bumphead parrotfish behaviour and catch rates. Secure customary sea tenure identified locations best suited to bumphead parrotfish management programmes, with a greater likelihood for local participation and programme success. The information was used to establish two marine protected areas in the region for bumphead parrotfish conservation.

The contrasting hatching patterns and larval growth of two sympatric clingfishes inferred by otolith microstructure analysis

2013 ◽  
Vol 64 (2) ◽  
pp. 157 ◽  
Author(s):  
Jorge E. Contreras ◽  
Mauricio F. Landaeta ◽  
Guido Plaza ◽  
F. Patricio Ojeda ◽  
Claudia A. Bustos
Keyword(s):  
Coastal Waters ◽  
Larval Growth ◽  
Microstructure Analysis ◽  
Larval Abundance ◽  
Otolith Microstructure ◽  
Austral Spring ◽  
Lunar Periodicity ◽  
Central Chile ◽  
Near Shore ◽  
Otolith Microstructure Analysis

Larval abundance, age, growth and hatching patterns of two sympatric clingfishes, Gobiesox marmoratus and Sicyases sanguineus (Pisces, Gobiesocidae), were estimated by using otolith microstructure analysis and compared on the basis of collections performed during the austral spring in 2010 off the coast of central Chile. G. marmoratus larvae were more abundant than S. sanguineus larvae during the study period. For both species, the sagittae deposited micro-increments during embryonic development (before hatching) and a hatch mark was observable in all examined otoliths. The sagittae otoliths of G. marmoratus grew in radius, perimeter and area faster than did the otoliths of S. sanguineus. Both species showed significant (P < 0.05) differences in larval growth and lunar periodicity of the hatching events. G. marmoratus hatched at smaller sizes (2.6 mm) mainly during the first-quarter moon and the larvae grew at rates of 0.24 ± 0.01 mm day–1. S. sanguineus hatched as larger larvae (>3 mm) during the first-quarter and full moons and grew at slower rates (0.14 ± 0.01 mm day–1) during the initial 25 days. The high abundance of larval clingfish in near-shore waters, temporal decoupling among the hatching events, and the different growth rates may be tactics to increase self-recruitment in coastal waters.

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