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Biometric Relationship Between Growth Pattern and Biological Reproduction of a Living Fossil Benthic Brachiopods (Lingula anatina Lamarck, 1801) in Aceh Northern Shore Octavina, Chitra; Irsad, Muhammad; Al-Ihsan, Muhammad Tareqh; Niwatana, Julya; Ulfah, Maria; Nurfadillah, Nurfadillah; Agustina, Sri; Nur, Firman Muhammad; Anh, Nguyen Thi Mai
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 28, No 3 (2023): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.28.3.267-277

Abstract

Brachiopods are a group of ancient marine invertebrates that are still found today, so they are known as "living-fossil". The purpose of this study was to determine reproductive biology through sex ratio approach, gonad maturity stages, body mass weight and growth pattern of L. anatina through size distribution approach, length-weight relationship, and condition factors. This research was conducted from April to December 2021, at the Aceh northern shore. The method used in this research is purposive sampling. The results showed that based on the morphological characteristics, only one species of brachiopods from the class Lingulata was found, namely Lingula anatina Lamarck, 1801. This species has an unequal sex ratio. Analysis of Body Mass Weight (BMW) and Gonado Somatic Index (GSI) shows an inverse relationship where the BMW value is lower than the GSI value. The condition factor of L. anatina also fluctuates every month, this is presumably due to availability of food in habitat. Gonad maturity stages of L. anatina at the locations of Syiah Kuala and Alue Naga were in spawning conditions (stages IV), especially for female L. anatina. These results indicate that the reproductive quality of L. anatina at the Aceh northern shore was maintained due to minimal exploitation from the surrounding community. Furthermore, the biometric (length – weight relationship) of L. anatina in the Aceh northern shore showing an isometric and negative allometric pattern. Basically, allometric growth is temporary, for example due to changes related to gonadal maturity, while isometric growth is a continuous change that is proportional.
Factors Affecting the Intention to Study a Master's Degree Abroad of Vietnamese Students and Recommendations Anh, Nguyen Thi Mai; Tam, Le Nguyen Thanh; Nguyen, Nguyen An; An, Mai Thai Binh
Journal of Multidisciplinary Science: MIKAILALSYS Vol 2 No 1 (2024): Journal of Multidisciplinary Science: MIKAILALSYS
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/mikailalsys.v2i1.2624

Abstract

Recently, there has been an annual increase in the number of masters in Vietnam. In contrast, universities in Vietnam do not recruit enough master's students to meet the set goals. This is due, in part, to the fact that students frequently pursue master's degrees abroad. This study aimed to determine the factors influencing students' intentions to pursue a master's degree abroad in engineering and economics. The proposed research model is based on Ajzen's Theory of Planned Behavior (TPB) (1991), developed from the previous Theory of Reasoned Action in 1975, and incorporates related studies. This model includes the factors that influence the intention to study for a master's degree—attitude, subjective norm, perceived behavioral control, communication, reasonable cost, and career opportunities—and the factors that influence the attitude to study for a master's degree. 434 valid samples for analysis, conducted several methods, including Cronbach's Alpha test, EFA, CFA, and SEM, to affirm the reliability of the measurement scale and the appropriateness of the variables in the research model. Based on the research results, we identify the influencing factors that underlie the article's recommendations.