Davao Research Journal最新文献

Evaluation of shrimp-associated species in abandoned ponds in Mati City, Philippines 菲律宾马蒂市废弃池塘中对虾相关物种的评估

Davao Research Journal Pub Date : 2024-06-03 DOI: 10.59120/drj.v15ino.2.193

Jason Pilotos, Yam Nesa Bualan

{"title":"Evaluation of shrimp-associated species in abandoned ponds in Mati City, Philippines","authors":"Jason Pilotos, Yam Nesa Bualan","doi":"10.59120/drj.v15ino.2.193","DOIUrl":"https://doi.org/10.59120/drj.v15ino.2.193","url":null,"abstract":"This study aimed to identify, characterize, and evaluate the biodiversity of shrimp-associated species in abandoned shrimp ponds, specifically assessing the trophic levels of bycatch species in Barangay Dahican, Mati City. Using a scoop net, researchers collected macrobenthic samples from Maitum, Lahusan, and Butuasan, finding 1,528 individuals with varying species compositions namely: Oreochromis niloticus (Nile tilapia), Coenobita cavipes (Land hermit crab), Canarium labiatum (Plicate conch), Rochia nilotica (Commercial top), Clithon oualaniense (Guamanian nerite), Cerithium coralium (Coral cerith), and Callinectes sapidus (Blue crab). Cerithium coralium was the most abundant species with 70% relative abundance, followed by Clithon oualaniense, with 29%. In contrast, the least abundant species were the Oreochromis niloticus and Canarium labiatum, with 1% relative abundance. Moreover, biodiversity indices revealed that Lahusan 1 (H' = 0.731; D=0.46) and Butuasan (H' = 0.714; D = 0.5) had higher biodiversity, whereas Lahusan 2 had the lowest (H' = 0.318; D = 0.15). In contrast, Lahusan 2 appeared to be the least diverse (H' = 0.318; D = 0.15). There were significant differences in terms of species abundance (df = 6, MS = 34.18, F = 6.02, P = 0.000) and none in terms of site locations (df = 3, MS = 18.71, F=2.08, P= 0.188). The study results showed that these associated species were mainly benthic and came from the nearby environment. Providing good management for the abandoned shrimp ponds in the area could mean reverting them to their original state to provide a habitat for other organisms.","PeriodicalId":504041,"journal":{"name":"Davao Research Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141270850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Youth`s psychosocial characteristics in agriculture: The case of Bukidnon, Philippines 农业中青年的社会心理特征：菲律宾 Bukidnon 案例

Davao Research Journal Pub Date : 2024-05-10 DOI: 10.59120/drj.v15i1.188

Anecil Quijano-Pagutayao

{"title":"Youth`s psychosocial characteristics in agriculture: The case of Bukidnon, Philippines","authors":"Anecil Quijano-Pagutayao","doi":"10.59120/drj.v15i1.188","DOIUrl":"https://doi.org/10.59120/drj.v15i1.188","url":null,"abstract":"The study sought to analyze the youth`s psychosocial characteristics in Agriculture in Bukidnon, Philippines. Specifically, this study aimed to describe the socio-demographic characteristics of the senior high school students; assess the knowledge of the students in agriculture; determine the student’s attitude towards agriculture and to identify the student’s motivation towards agriculture as a degree program. Data were gathered through guided interview/survey that was personally administered to 383 respondents who were in Grade 12 senior high school students in the DepEd, District of Bukidnon. Focus group discussion and key informant interview were also used in the study. Descriptive statistical tools such as mean, rank, percentage, and frequency counts were employed. Findings of the study reveal that the respondents of the study are mostly female, and have experiences in farming. Their parents have moderate level of education. More than half of the respondents’ families do not own a piece of land used in agriculture. They are willing to engage in agriculture but are not willing to enroll in an agriculture degree. These youth have low level of knowledge and skills in agriculture and have favorable attitude and positive motivation towards a degree.","PeriodicalId":504041,"journal":{"name":"Davao Research Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140992023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Copepod distribution and diversity in the coastal areas of Ban-ao and Lambajon, Davao Oriental, Philippines: Environmental influences and conservation implications 菲律宾东达沃省 Ban-ao 和 Lambajon 沿海地区桡足类的分布和多样性：环境影响和保护意义

Davao Research Journal Pub Date : 2024-05-08 DOI: 10.59120/drj.v15ino.2.185

Hanelen Pislan, Cirilo Ybañez

{"title":"Copepod distribution and diversity in the coastal areas of Ban-ao and Lambajon, Davao Oriental, Philippines: Environmental influences and conservation implications","authors":"Hanelen Pislan, Cirilo Ybañez","doi":"10.59120/drj.v15ino.2.185","DOIUrl":"https://doi.org/10.59120/drj.v15ino.2.185","url":null,"abstract":"Copepods are essential components of marine ecosystems, facilitating energy transfer within these complex systems. The study investigates copepod diversity and distribution in Ban-ao and Lambajon coastal areas in Baganga, Davao Oriental, highlighting the environmental factors influencing copepod populations. Four copepod families representing different orders were identified, with Harpacticoida, Calanoida, and Cyclopoida prevalent in both sites, while Misophrioida was exclusive to Lambajon. Physico-chemical parameters such as dissolved oxygen (DO), pH, salinity, sediment composition, water depth, and temperature were analyzed to understand their correlation with copepod density. The study reveals variations in copepod density and abundance between the sites, with Lambajon showing a higher total density (49 ind/cm³) compared to Ban-ao (35 ind/cm³). The Pearson correlation matrix illustrates complex relationships between copepod density and environmental parameters in each site. In Ban-ao, strong positive correlations were found between copepod density and DO (r = 0.65) and temperature (r = 0.36). In Lambajon, positive correlations existed between water depth and copepod density (r = 0.20). Both sites exhibit low copepod diversity overall, potentially due to anthropogenic pressures. These findings emphasize the need for further research to understand the interactions between environmental factors and copepod diversity, essential for effective conservation and management strategies in these coastal ecosystems. \u0000 ","PeriodicalId":504041,"journal":{"name":"Davao Research Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140997852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Diminishing mangrove forest structures in Davao City, Philippines 菲律宾达沃市不断缩小的红树林结构

Davao Research Journal Pub Date : 2024-05-08 DOI: 10.59120/drj.v15ino.2.186

John Glen Seniel, Lea Jimenez, Emily Antonio

{"title":"Diminishing mangrove forest structures in Davao City, Philippines","authors":"John Glen Seniel, Lea Jimenez, Emily Antonio","doi":"10.59120/drj.v15ino.2.186","DOIUrl":"https://doi.org/10.59120/drj.v15ino.2.186","url":null,"abstract":"The decline of mangrove coverage across the Philippines to 50% of its original coverage in present years has, led to significant reductions of ecological functions to fisheries and benefits to man. The mangrove forest in Davao City was assessed for its taxonomic list, Importance Value Index, abundance and distribution of mangrove regenerations, forest structure, and species diversity status. The study was conducted in Barangay Bunawan, Lasang, Panacan, Matina Aplaya, 76-A, and Bago Aplaya. All data were gathered by establishing sampling plots (10m x 10m) using the modified transect-plot method. Overall, a total of 34 mangrove species were listed, of which 21 were identified as true mangroves and 13 as mangrove associates. The 21 mangrove species were very low in species richness (54%). Importance Value Index showed that Avicennia marina, Rhizophora apiculata, and Sonneratia alba, respectively, as dominant mangrove species. The mangrove regenerations were in poor condition (<0.50) while relative abundances of growth stages consisted of mature stands at 46.04%, saplings with 27.78%, and seedlings with 26.18%. General diversity indices obtained a low value on the Shannon-Wiener diversity index (H'=1.42) and an average value on the species evenness index (E=0.61), all indicating stressful and unstable mangrove forests. Thus, the mangrove forest ecosystem has imbalances and eventually, only certain species would survive.","PeriodicalId":504041,"journal":{"name":"Davao Research Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140999301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantifying tree height and canopy structure in a forest in Davao Oriental State College of Science and Technology, Mati City, Davao Oriental 量化东达沃省马蒂市东达沃州立科技学院森林中的树高和树冠结构

Davao Research Journal Pub Date : 2024-01-05 DOI: 10.59120/drj.v12i3.118

Rancil Quin Salang

{"title":"Quantifying tree height and canopy structure in a forest in Davao Oriental State College of Science and Technology, Mati City, Davao Oriental","authors":"Rancil Quin Salang","doi":"10.59120/drj.v12i3.118","DOIUrl":"https://doi.org/10.59120/drj.v12i3.118","url":null,"abstract":"Forests are landscapes dominated by trees and cover approximately 30% of the earth’s land surface, housing most of its biodiversity. This study aimed to quantify the tree height and canopy structure of a man-made forest in the locality, particularly the density, relative density, frequency, relative frequency, coverage, relative coverage, diversity, and importance value of the trees in the study area. The establishment of the study area was conducted on September 8, 2017, a period of one day and a transect-quadrat method was employed to assess the trees in the forest. Two (2) species of tree were found in the study area. These were Gmelina (Gmelina arborea) and Mahogany (Swietenia macrophylia). The densest tree species was Mahogany with 0.53 followed by Gmelina with 0.47. Mahogany was also observed to have a higher frequency than Gmelina. Gmelina in the study area has larger canopy coverage and circumference at breast height than Mahogany attributed to its fast-growing nature. The diversity of tree species in the study area was found to be low, attaining only 0.47 on the Shannon-Wiener Diversity Index and 0.69 on Simpson’s Diversity Index due to the small number of tree species present. The results of the importance value were low, with 1.32 for Gmelina and 1.68 for Mahogany since they are relatively young and have similar numbers of individuals.","PeriodicalId":504041,"journal":{"name":"Davao Research Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139382395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Factors affecting the decomposition of leaf litters in a mini-forest 影响小型森林腐叶土分解的因素

Davao Research Journal Pub Date : 2024-01-05 DOI: 10.59120/drj.v12i3.119

Jireh Rosales, E. Macusi

引用次数: 0

Decomposers found on a partially decomposed Caimito (Chrysophyllum caimito): Example of a log ecosystem 在部分腐烂的菊芋（Chrysophyllum caimito）上发现的分解者：原木生态系统实例

Davao Research Journal Pub Date : 2023-10-20 DOI: 10.59120/drj.v12i3.103

Rancil Quin Salang

引用次数: 0