Plasticity in dormancy behaviour of Calanoides acutus in Antarctic coastal waters

Copepods that enter dormancy, such as Calanoides acutus, are key primary consumers in Southern Ocean food webs where they convert a portion of the seasonal phytoplankton biomass into a longer-term energetic and physiological resource as wax ester (WE) reserves. We studied the seasonal abundance and lipid profiles of pre-adult and adult C. acutus in relation to phytoplankton dynamics on the Western Antarctic Peninsula. Initiation of dormancy occurred when WE unsaturation was relatively high, and chlorophyll a (Chl a) concentrations, predominantly attributable to diatoms, were reducing. Declines in WE unsaturation during the winter may act as a dormancy timing mechanism with increased Chl a concentrations likely to promote sedimentation that results in a teleconnection between the surface and deep water inducing ascent. A late summer diatom bloom was linked to early dormancy termination of females and a second spawning event. The frequency and duration of high biomass phytoplankton blooms may have consequences for the lifespan of the iteroparous C. acutus females (either 1 or 2 years) if limited by a total of two main spawning events. Late summer recruits, generated by a second spawning event, likely benefitted from lower predation and high phytoplankton food availability. The flexibility of copepods to modulate their life-cycle strategy in response to bottom-up and top-down conditions enables individuals to optimize their probability of reproductive success in the very variable environment prevalent in the Southern Ocean.

Penerapan Algoritma Knuth-Morris-Pratt pada Fungsi Pencarian Dokumen untuk Sistem Informasi Administrasi Sekolah Berbasis Website

The document search function in the quality assurance unit's information system uses the Knuth-Morris-Pratt algorithm. This KMP algorithm is a search algorithm that will match the pattern or arrangement of words to be searched from left to right at the beginning of the text and then shift the order of words until the word order is at the end of the text. The KMP algorithm has the advantage of matching matches on large files. The system development method used is the Rapid Application Development method. This RAD method is a life cycle strategy aimed at providing development that is much faster and gets results with better quality compared to results achieved through traditional cycles. Application of School Administration Information System is expected to be able to overcome problems arising from conventional document control processes to make it easier and more precise. Abstrak: Fungsi pencarian dokumen pada sistem informasi unit jaminan mutu menggunakan algoritma Knuth-Morris-Pratt. Algoritma KMP ini merupakan algoritma pencarian yang akan mencocokkan pattern atau susunan kata yang akan dicari dari kiri ke kanan pada awal teks dan kemudian menggeser susunan kata sampai susunan kata tersebut berada di ujung teks. Algoritma KMP memiliki keunggulan pencarian kecocokan pada file yang berukuran besar. Metode pengembangan sistem yang digunakan yaitu metode Rapid Application Development. Metode RAD ini adalah strategi siklus hidup yang ditujukan untuk menyediakan pengembangan yang jauh lebih cepat dan mendapatkan hasil dengan kualitas yang lebih baik dibandingkan dengan hasil yang dicapai melalui siklus tradisional. Aplikasi Sistem Informasi Administrasi Sekolah ini diharapkan dapat mengatasi permasalahan yang timbul dari proses pengendalian dokumen secara konvensional agar lebih mudah dan tepat.

MENGHADAPI PERSAINGAN PENYELENGGARA IBADAH HAJI KHUSUS (PIHK) DAN PENYELENGGARA PERJALANAN IBADAH UMRAH (PPIU) DI KALIMANTAN SELATAN MELALUI STRATEGI SIKLUS HIDUP PRODUK

As country with majority population of Muslims, Indonesia has provided a great opportunity for Organizers of the Special Hajj Worship (Penyelenggara Ibadah Haji Khusus-PIHK) and Organizers of the Umrah Worship Tour (Penyelenggara Perjalanan Ibadah Umrah-PPIU) to serve the people that want to departing the Hajj in a faster time. This opportunity because of the high interest of the Indonesian people to perform the Hajj worship, which has led to the long waiting of period for the Hajj worship through the regular Hajj. The province of South Kalimantan, which is the one of province with the third longest regular hajj waiting period time, provides extensive potential for PIHK and PPIU to carry out activities in order to provide services for special hajj and umrah. Therefore, it is important to do various strategies by PIHK and PPIU in South Kalimantan in the face of competition, one of them is through the product life cycle strategy (product life cycle)

MONITORING OF HARMFUL ORGANISMS AS THE BASIS OF PHYTOSANITARY OPTIMIZATION OF AGROECOSYSTEMS POTATOES

The studies were conducted in the period from 1988 to 2017 in twelve potato farms of Novosibirsk, Kemerovo regions and Altai. The list of economically significant harmful organisms in potato agroecosystems of forest-steppe of Western Siberia and their classification according to life strategies is given. In potato agroecosystems are dominated by K (Kr) - strategies: multi-year weeds, wireworms (click beetles), Rhizoctonia, Fusarium, Phoma, scab, bacterial, Ditylenchus, viral diseases (72,2 %). Population with r (rK) -strategies: one-year weeds, Colorado potato beetle, late blight and early blight (27,8 %). It is shown, that seed tubers in farms are always infected with sclerotial form of the causative agent of Rhizoctonia, in some cases up to 80 %. The proportion of tubers bacteriosis is about 2 % (up to 20 %), stem nematode in some years reached 19,5 %. Tubers affected by late blight in the region, meet after years epiphitoties the development of the disease reaching 5,8 %. It is shown that the greatest period of survival in the soil is characterized by harmful organisms with K (Kr) life cycle strategy: 5-6 years or more for certain species. Оne-year weed plants are characterized mainly by r (rK) life cycle strategy, have high seed productivity and a wide ecological niche. It was found that the stock of seeds of weed plants in the arable horizon ranges from 8,6 to 22,5 million/ha with a predominance of Amaránthus retrofléxus and Panicum miliaceum. Multi-year weeds mainly with adaptations to (Kr) -strategists form a reserve of powerful underground vegetative mass. Species with r-strategy are more adapted to the development of ground-air environment, forming a significant number of zoospores, conidia, seeds, etc. In the developed system of monitoring and forecast of harmful organisms into account their adaptation to the development of the main factors in adapting to the soil, seed material, development of ground-air environment.

Asexual reproduction of Pliocene solitary scleractinian coralTruncatoflabellum: a morphological and biometric study

Truncatoflabellumhas been considered a free-living genus that exhibits both sexual and asexual phases; divided lower coralla (anthocauli) are specialized for asexual reproduction by transverse division through a decalcification process, whereas the upper coralla (anthocyathi) only undertake sexual reproduction, in a life-cycle strategy that includes a distinct alternation of generations. However, little evidence has been presented to support this idea of its life cycle. We elucidate the life mode ofTruncatoflabellumby identifying key fossil characters (e.g., multiple rejuvenations and decalcification records just beneath lateral spines) and statistically analyzing the size distributions of over 500 individual coralla. Results of those morphological and biometric analyses clearly indicate alternation of generations in the life cycle ofTruncatoflabellum.