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National Committee on Marine Sciences (NCMS)

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    Reproductive phenology and morphology of Macrocystis pyrifera (Laminariales, Ochrophyta) from southern New Zealand in relation to wave exposure1
    Leal, Pablo P.; Roleda, Michael Y.; Fernández, Pamela A.; Nitschke, Udo; Hurd, Catriona L. (Wiley, 2021-07-23)
    Macrocystis pyrifera is a major habitat forming kelp in coastal ecosystems of temperate regions of the northern and southern hemispheres. We investigated the seasonal occurrence of adult sporophytes, morphological characteristics, and reproductive phenology at two sites within a wave-protected harbour and two wave-exposed sites in southern New Zealand every 3–4 months between 2012 and 2013. Seasonality in reproduction was assessed via the number of sporophylls, the occurrence of sori on sporophylls, and non-sporophyllous laminae (fertile pneumatocyst-bearing blades and fertile apical scimitars), meiospore release, and germination. We found that M. pyrifera was present and reproductive year-round in three of the four sites, and patterns were similar for the wave-exposure conditions. Sori were found on pneumatocyst-bearing blades and apical scimitars in addition to the sporophylls, and viable meiospores were released from all three types of laminae. Morphological variations between sites with different wave exposure indicate that sporophytes from wave-protected sites have bigger blades and holdfasts and are longer than those from wave-exposed sites. We discuss the implications of these biological variables for the ecology of M. pyrifera inhabiting different wave exposure environments in southern New Zealand.
    Pablo P. Leal was supported by a scholarship from BECAS CHILE-ANID and by Programa Integral de Desarrollo de Acuicultura de Algas para Pescadores Artesanales (Etapa 4), funded by the Subsecretarıa de Economıa y Empresas de Menor Tamano (Convenio 2016). Michael Y. Roleda acknowledges the Philippine’s Department of Science and Technology (DOST) Balik Scientist Program for the fellowship. Udo Nitschke gratefully acknowledges support by Skidmore College, 815 North Broadway, Saratoga Springs, NY 12866, USA. Pamela A. Fernandez was supported by the Chilean National Commission for Scientific and Technological Research (ANID/FONDECYT; Postdoctoral grant 3170225 and grant 1180647) and ANID/Programa Basal (CeBiB, FB-0001). We are grateful to Rocio Suarez for assisting in field sampling.
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    ₱900-M PHL shrimp exports to US may be affected by ban
    San Juan, Andrea (Philippine Business Daily Mirror Publishing, Inc., 2024-02-18)
    Nearly a billion pesos worth of shrimp exports to the United States are at risk due to the US’s temporary ban on the importation of shrimp and shrimp products from the Philippines, data processed by the Department of Trade and Industry-Export Marketing Bureau (DTI-EMB) showed. Last year, Philippine shrimp exports to the US reached nearly P900 million. In five years, the highest was recorded in 2019 when it hit more than P2 billion. In an advisory published on DTI-EMB’s website last week, the export marketing arm of DTI revealed that the US temporarily prohibited importation of shrimp caught using commercial fishing technology that “adversely” affects turtles such as the use of Turtle Excluder Devices.