scholarly journals The Abundance and Distribution of Mangrove Gastropods from Kuala Selangor Nature Park, Selangor

2021 ◽  
Vol 15 (2) ◽  
pp. 1-12
Author(s):  
Ajmal Jahid ◽  
◽  
Harinder Rai Singh ◽  
◽  
Keyword(s):  
Food Chain ◽  
Food Source ◽  
Line Transect ◽  
Breast Height ◽  
Nature Park ◽  
Line Transect Method ◽  
Local Populace ◽  
Abundance And Distribution ◽  
Potential Food

This study reports on the abundance and distribution of mangrove gastropods from Kuala Selangor Nature Park, Malaysia (KSNP). The line transect method with quadrats (5m x 5m) was employed to sample the gastropods. Gastropods were collected from the leaves, branches, stems and roots of trees and the mangrove floor. Nineteen gastropod taxa from seven families were recorded from the Bruguiera, mixed (Bruguiera, Avicennia and Rhizophora), Avicennia and Rhizophora zones. Avicennia sp. recorded the largest Girth at Breast Height (GBH) (mean±sd=37.3±18.2 cm) while Bruguiera sp. recorded the smallest GBH (mean=22.36±8 cm). The overall density of the gastropods at KSNP was 0.85 no/m2. The gastropod density was higher at the Avicennia & Rhizophora zone (150-200m (closer to the mudflats) (0.064±0.084 no/m2) followed by the mixed zone (50-150m) (0.046±0.30 no/m2) and lowest at the Bruguiera zone (0-50m) (0.08±0.080 no/m2) (closer to the coastal bund). Gastropod density between sampling zones did not vary significantly (p>0.05) but generally increased from the bund towards the mudflat edge. Further studies of the role of gastropods in the coastal food chain, as bio-indicators of habitat change and as potential food source for local populace are needed.

Krill: The invention of a global resource in the long 1970s

2020 ◽  
Vol 13 (3) ◽  
pp. 634-658
Author(s):  
Christian Kehrt
Keyword(s):  
Food Chain ◽  
Food Source ◽  
Antarctic Krill ◽  
Euphausia Superba ◽  
World Population ◽  
Limits To Growth ◽  
Political Concern ◽  
Feasible Alternative ◽  
Potential Food ◽  
Antarctic Krill Euphausia Superba

Krill, a little shrimp best known as a food source for whales and seals, occupies a central role in the food chain of the oceans. In the 1970s it gained increased attention as a potential food source for humans as well. With its supposedly inexhaustible amounts of biomass, Antarctic krill (Euphausia superba) seemed to be a feasible alternative to fish, whose populations were suffering from overharvesting, and promised to provide enough protein for a growing world population at a time when the limits to growth were an issue of great political concern. Krill is a key object that brings together different actors from science, politics, and industry in a global struggle for living resources. There were many scientific and especially technical questions to be solved concerning the harvesting and processing of krill that will be addressed in this paper. I will argue that there were biological as well as cultural limits to these far-reaching technocratic visions that were not fully taken into account by fisheries experts in the 1970s.

scholarly journals KOMPOSISI JENIS DAN KEPADATAN BIVALVIA DIPERAIRAN PANTAI DUSUN TANJUNG METIELLA NEGERI LIANG KECAMATAN SALAHUTU

2017 ◽  
Vol 4 (1) ◽  
pp. 17-21
Author(s):  
Aneke Latuihamallo
Keyword(s):  
Data Collection ◽  
Food Chain ◽  
Line Transect ◽  
Habitat Conditions ◽  
Marine Waters ◽  
Descriptive Research ◽  
Descriptive Information ◽  
Line Transect Method

Background: Ecologically, marine waters are divided into several zones, one of which is intertidal waters, where various types have adapted well to habitat conditions in various zones and types of ecosystems. The existence of bivalves plays an important role in the lives of fish and other biota that are bound to one food chain. Method: This research is a descriptive research that is to express descriptive information about bivalves in the waters of Metiella Cape. This study uses data collection techniques using the line transect method where each observation transect is drawn by a rope perpendicular to the coastline of 5 transects with a distance between each transect of 20 meters. As long as the transect is made of sample plots or quadrants with an area of ​​1 m X 1 m with a distance between each of the 5 meter quadrants, observation of the type of bivalvia is carried out in each quadrant. Results: The composition of Bivalvia found in Metiella Cape waters is 282 individuals classified in 2 sub-orders, 5 super families, 5 families, 7 genera, 8 species, namely: Pinna muricatta, Trachycardium rugosum, Fragum unedo, Mactra violacea, Tellina spengleri, Tellina timorensis, Gafrarium tumidum, Meretrix linnaeus. Conclusion: In the waters of Metiella Cape, 8 types of Bivalvia were found, namely: Fragum unedo, Trachycardium rugosum, Mactra violacea, Tellina spengleri, Tellina timorensis, Pinna muricata, Gafrarium tumidum and Meretrix linnaeus. The highest density value is found in transect II with a density value of 5.8 ind / m2 found in the type of Fredoum unedo and the lowest density value found on transect III with a density value of 0.2ind / m2 found in Mactra violacea.

scholarly journals Macroalgae Community Structure in Tanjung Merah Waters, Bitung City

2021 ◽  
Vol 9 (1) ◽  
pp. 138
Author(s):  
Febrio V. Achmad ◽  
Rene Ch. Kepel ◽  
Stephanus Vianny Mandagi ◽  
Ferdinand F. Tilaar ◽  
John L. Tombokan ◽  
...  
Keyword(s):  
Community Structure ◽  
Food Source ◽  
Raw Materials ◽  
Diversity Index ◽  
Coastal Ecosystems ◽  
Marine Macroalgae ◽  
Line Transect ◽  
Potential Food Source ◽  
Evenness Index ◽  
Potential Food

Seaweed is a component of coastal ecosystems that makes a major contribution to the Indonesian economy. This marine plant is a potential food source and industrial raw materials that can be used to improve people's welfare as these marine macroalgae are widely distributed in Indonesian waters. This study was carried out because of its important role for the ecosystems and the economy of the country. The purpose of this research is to determine the community structure of this macroalgae in the waters of Tanjung Merah Village of Matuari District of Bitung City. The data were collected from January 2021 to March 2021 using a transect of 1 x 1 m2 which was placed along a 100 m line transect with 5 m intervals. The macroalgae found were 6 species consisting of 2 types of Chlorophyta class and 4 species of Rhodophyta class. The macroalgae diversity index of around is 1.06 categorized as moderate diversity; the index of dominant is 0.44 moderate and the evenness index is 1.79 or low.Keywords: Macroalgae; Community; Diversity.AbstrakRumput laut merupakkan komponen ekosistem wilayah pesisir yang memberikkan kontribusi yang besar bagi ekonomi Indonesia. Potensi sumberdaya hayati laut Sulawesi Utara, khususnya Kota Bitung yang cukup potensial untuk dapat dimanfaatkan sebagai sumber pangan dan bahan baku industri guna peningkatan kesejahteran masyarakatkarena makroalga termasuk salah satu sumberdaya hayati laut yang banyak terdapat di perairan Indonesia. Makroalga memiliki potensi besar untuk dikembangkan, karena memiliki peranan penting baik dari aspek ekologi dan memiliki nilai ekonomi.  Tujuan penelitian ini adalah untuk mengetahui struktur komunitas makroalga yang ada di perairan Kelurahan Tanjung Merah Kecamatan Matuari Kota Bitung. Penelitian ini dilaksanakan pada bulan Januari 2021 sampai Maret 2021. Data dikumpulkan dengan cara di sampling menggunakan kuadrat berukuran 1x 1 m2 yang diletakkan pada garis transek sepanjang 100 m dengan interval 5 m. Makroalga yang ditemukan 6 spesies yang terdiri atas Kelas Chlorophyta berjumlah 2 jenis, dan kelas Rhodophyta 4 jenis. Indeks keanekaragaman makroalga sekitar 1.06 dikategorikan sedang, indeks dominasi 0.44 dikategorikan rendah dan untuk indeks kemerataan 1,79 dikategorikkan rendah.Kata kunci: Makroalga; Komunitas; Keanekaragaman

Dammed If You Don’t, But What If You Do? Breaching the Lower Snake River Dams in Washington State

2020 ◽  
Vol 4 (1) ◽  
pp. 1-12
Author(s):  
Elizabeth C. Lopardo ◽  
Clare M. Ryan
Keyword(s):  
Policy Process ◽  
Food Source ◽  
Washington State ◽  
Federal Agencies ◽  
Snake River ◽  
Environmental Groups ◽  
Steep Decline ◽  
Mitigation Techniques ◽  
Economic Analyses

Four dams on the lower Snake River in Washington State generate hydropower and allow for regional agriculture and barge shipping to Portland OR. However, the dams impede the migration of local salmon populations (Oncorhynchus spp.), which are in steep decline, and drastically impact the populations of salmon and orca whales, for whom salmon are a primary food source. For years, environmental groups have argued for breaching the dams; other interests counter that the dams are too critical to the economy of the region to lose; and federal agencies assert that the dams can remain and salmon populations will recover with mitigation techniques. Scientific and economic analyses, litigation, and elected officials’ efforts have not been able to move the issue towards a solution. Readers will examine the interests of primary actors in the issue, how they influence the policy process, the role of scientific and economic analyses, and possible approaches for resolving the issue.

scholarly journals Spent Brewer’s Yeast as a Source of Insoluble β-Glucans

2021 ◽  
Vol 22 (2) ◽  
pp. 825
Author(s):  
Ionut Avramia ◽  
Sonia Amariei
Keyword(s):  
Emulsion Stability ◽  
Extraction Process ◽  
Brewer’S Yeast ◽  
Brewer's Yeast ◽  
Brewing Process ◽  
Food Applications ◽  
Water Holding ◽  
Potential Food ◽  
Insight Into

In the brewing process, the consumption of resources and the amount of waste generated are high and due to a lot of organic compounds in waste-water, the capacity of natural regeneration of the environment is exceeded. Residual yeast, the second by-product of brewing is considered to have an important chemical composition. An approach with nutritional potential refers to the extraction of bioactive compounds from the yeast cell wall, such as β-glucans. Concerning the potential food applications with better textural characteristics, spent brewer’s yeast glucan has high emulsion stability and water-holding capacity fitting best as a fat replacer in different food matrices. Few studies demonstrate the importance and nutritional role of β-glucans from brewer’s yeast, and even less for spent brewer’s yeast, due to additional steps in the extraction process. This review focuses on describing the process of obtaining insoluble β-glucans (particulate) from spent brewer’s yeast and provides an insight into how a by-product from brewing can be converted to potential food applications.

Abundance Estimation of Diving Animals by the Double-Platform Line Transect Method

Biometrics ◽  
2003 ◽  
Vol 59 (3) ◽  
pp. 512-520 ◽  
Author(s):  
Hiroshi Okamura ◽  
Toshihide Kitakado ◽  
Kazuhiko Hiramatsu ◽  
Mitsuyo Mori
Keyword(s):  
Abundance Estimation ◽  
Line Transect ◽  
Line Transect Method

scholarly journals The Species Composition and Seasonal Dynamics of Thrips (Thysanoptera) Populations on Maize (Zea Mays L.) in Southeastern Poland

2011 ◽  
Vol 51 (3) ◽  
pp. 210-216 ◽  
Author(s):  
Halina Kucharczyk ◽  
Paweł Bereś ◽  
Zbigniew Dąbrowski
Keyword(s):  
Zea Mays ◽  
Species Composition ◽  
Seasonal Dynamics ◽  
Food Source ◽  
Zea Mays L ◽  
Maize Plant ◽  
Seasonal Abundance ◽  
Immature Stages ◽  
Thrips Species

The Species Composition and Seasonal Dynamics of Thrips (Thysanoptera) Populations on Maize (Zea MaysL.) in Southeastern PolandThrips species composition and seasonal abundance was studied on maize crops during two seasons (2006-2007), in southeastern Poland. Altogether 21 species have been identified, among themFrankliniella tenuicornis(Uzel 1895) andHaplothrips aculeatus(Fabricius 1803) which are a graminicolous species and were eudominants, comprising 96.8% in 2006 and 82.0% in 2007 of all collected specimens. Other species occurred only in low numbers. The frequent and numerous presence ofF. tenuicornisspecies in their immature stages in the samples, confirmed the role of the maize plant as the host.H. aculeatusprobably chose maize as a food source and substitute plant for breeding.

scholarly journals Density and Flock Size of the Raven (Corvus corax) In the Orawa - Nowy Targ Basin During Non-Breeding Season

Ring ◽  
2006 ◽  
Vol 28 (2) ◽  
pp. 119-125
Author(s):  
Michał Ciach ◽  
Dominik Wikar ◽  
Małgorzata Bylicka
Keyword(s):  
Breeding Season ◽  
Early Spring ◽  
Food Resources ◽  
High Density ◽  
Line Transect ◽  
Flock Size ◽  
Early Winter ◽  
Corvus Corax ◽  
Line Transect Method ◽  
Breeding Seasons

Density and Flock Size of the Raven (Corvus corax) In the Orawa - Nowy Targ Basin During Non-Breeding Season During the 2002/2003-2004/2005 non-breeding seasons the density of the Raven in the open habitats of the Orawa - Nowy Targ Basin was studied by line transect method. The results were analysed in four periods (autumn, early winter, winter and early spring). The median density of Ravens did not differ significantly between individual periods and was respectively: 3.5, 3.8, 4.8 and 3.8 indiv. / 10 km. Number of birds during particular controls varied from 1.0 to 24.8 indiv. / 10 km. However, while excluding flocks, the median density of single individuals and pairs of the Raven was considerably lower and in subsequent periods reached respectively: 2.2, 2.4, 2.2 and 1.7 indiv. / 10 km. Flock size did not differ significantly between individual periods. Single individuals and, less often, groups of two birds were recorded mostly. Small (3-5 indiv.) and medium (6-15 indiv.) flocks were recorded rarely and large flocks (16 indiv. and above) - only exceptionally. The high density and strong fluctuations of abundance of Ravens were determined by flocks presence, which was probably linked to irregular occurrence of food resources.

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